preface \n \n martin gardner
1956
Martin Gardner

Preface

xi



tricks with cards  part one \n chapter intro \n martin gardner
1956
Martin Gardner

Tricks with Cards  Part One

1



the curiosities of peirce \n history of mathematical card tricks, history of charles peirce's work \n martin gardner
1956
Martin Gardner

The Curiosities of Peirce

2



the five poker hands \n five spectators dealt five cards each, think of one, put back and redealt, divine all the selections \n unknown
1956

The Five Poker Hands

3



the piano trick \n piano card trick, standard \n unknown \n el rey del empalme \n Áriston
1956

The Piano Trick

Variations

4



the estimated cut \n trick that fooled einstein \n unknown
1956

The Estimated Cut

5



findley's fourcard trick \n four cards secretly placed in pocket as prediction, pull out the necessary cards to form suit and value (using binary system) \n arthur finley \n the secret mathematician \n charles t. jordan \n arthur finley
1956
Arthur Finley

Findley's FourCard Trick

Also published here

6



a baffling prediction \n forming four piles using the number ten, then count down the sum of the cards to the 40th card to match prediction \n unknown \n henry christ's improvement \n henry christ
1956

A Baffling Prediction

Variations

7



henry christ's improvement \n same as a baffling prediction, but with a selection controlled to the 40th position, and the count is done backwards from ten \n henry christ \n a baffling prediction \n unknown
1956
Henry Christ

Henry Christ's Improvement

Inspired by

8



the cyclic number \n a packet containing six cards forming the number 142857, when multiplied by any number from 2 to 6, gives a result which the cards themselves reveal \n lloyd e. jones
1956
Lloyd E. Jones

The Cyclic Number

9



the missing card \n method to clock the deck to find missing card \n unknown \n jordan's method \n charles t. jordan \n martin gardner
1956

The Missing Card

Variations

10



jordan's method \n charles jordan's method for clocking a deck (can be used to clock for four removed cards), with a tip from martin gardner to use the feet or fingers to help keep track of the suits \n charles t. jordan \n martin gardner \n the missing card \n unknown \n mentally clocking the deck \n unknown \n simplified mnemonics \n martin gardner
1956
Charles T. Jordan, Martin Gardner

Jordan's Method

Inspired byRelated to

11



stewart james' color prediction \n miraskill, three phases, magician predicts outcome each time \n stewart james
1956
Stewart James

Stewart James' Color Prediction

13



the royal pairs \n packet of kings and queens are cut many times and held behind back, magician can take out the matching king/queen pairs of the same suit \n unknown \n paar um paar \n rodolfo \n die heiratsvermittlung \n wolfgang rohde
1956

The Royal Pairs

Variations

15



matching the colors \n deck shuffled face up and face down, magician can separate into two piles containing the same number of face up cards. alternative is to shuffle red and black cards. \n bob hummer
1956
Bob Hummer

Matching the Colors

17



hummer's reversal mystery \n cato trick, magician can name correctly number of face up cards after cut and turn over procedure. oscar weigle variation: colors are also separated \n bob hummer \n oscar weigle \n the little moonies \n bob hummer \n stitches in time \n stephen tucker
1956
Bob Hummer, Oscar Weigle

Hummer's Reversal Mystery

Variations

17



the little moonies \n cato trick, uses cards with drawing of either smiling/frowning face. two cards are marked on the back and after mixing, shown to be the only ones frowning while other cards are smiling \n bob hummer \n hummer's reversal mystery \n bob hummer \n oscar weigle \n the little moonies \n bob hummer
1956
Bob Hummer

The Little Moonies

Inspired byAlso published here

19



o'connor's fourace trick \n 1020 force to find four aces one by one \n billy o'connor
1956
Billy O'Connor

O'Connor's FourAce Trick

20



the magic of manhattan \n cut the deck into two piles, one pile is counted, the two digits in the number of cards is added together to get a single digit, count down to that number in that pile to find selection, the phrase the magic of manhattan is spelled to find selection, tentwenty force principle as control \n bill nord \n the magic of manhattan \n bill nord \n the magic of manhattan \n bill nord \n the relatively unknown location \n larry jennings \n the magic card \n bill nord \n roberto giobbi
1956
Bill Nord

The Magic of Manhattan

Related toVariations

20



tricks with cards  part two \n chapter intro \n martin gardner
1956
Martin Gardner

Tricks with Cards  Part Two

20



predicting the shift \n packet of thirteen cards (ace to king), spectator shifts any number of cards from top to bottom, magician can immediately take out a card with a value corresponding to the number of cards shifted \n unknown
1956

Predicting the Shift

21



the keystone card discovery \n two numbers named, predicted card is found at position equal to the difference between the two numbers. \n charles t. jordan \n mathematical black jacks \n henry christ
1956
Charles T. Jordan

The Keystone Card Discovery

Related to

22



twopile location \n card selected via some dealing into two piles. later will spell this is the card i selected to find the card \n unknown \n lieben sie mathematische kartenkunststücke? \n peter wilker
1956

TwoPile Location

Variations

22



spelling the spades \n packet of ace to king of spades, spell ace to king one after another, originally titled the improved chevalier card trick \n charles t. jordan \n the spelling bee \n jack chanin \n john mcardle \n john weiss \n al flosso
1956
Charles T. Jordan

Spelling the Spades

Related to

23



elmsley's card coincidence \n deck cut into two piles, a card selected in each pile, later shown to turn up at the same position, handling is by vernon \n alex elmsley \n dai vernon \n dual countdown \n bob king
1956
Alex Elmsley, Dai Vernon

Elmsley's Card Coincidence

Variations

25



magic by mail \n divination of selected card by mail, deck is sent through the post, deck is shuffled and card is selected, only half the cards are sent to the magician, yet card is divined. uses interlocking chains \n charles t. jordan \n long distance mind reading \n charles t. jordan
1956
Charles T. Jordan

Magic by Mail

Also published here

27



belchou's aces \n poker player's picnic, four aces found via dealing and transferring cards between four piles, credited to steve belchou \n steve belchou \n a poker player's picnic \n unknown \n five nine king \n martin gardner
1956
Steve Belchou

Belchou's Aces

Related to

27



the tittattoe trick \n packet of nine cards used to play tictactoe with a spectator (face up and down cards). finale is revealed that the result is a magic square, each row/column/diagonal adds up to fifteen \n don costello \n dai vernon \n martin gardner \n tic tac toe force \n martin gardner \n draw for the devil \n robert e. neale \n tateti \n Áriston
1956
Don Costello, Dai Vernon, Martin Gardner

The TitTatToe Trick

Related toVariations

28



other tricks of interest \n suggested reading list \n martin gardner
1956
Martin Gardner

Other Tricks of Interest

31



from gergonne to gargantua \n chapter intro, describes gergonne's pile problem, which is basically the 21 card trick using twenty seven cards, see following entries \n joseph diez gergonne \n sorcerer's sevens iii \n charles hudson \n pile driver \n matt baker
1956
Joseph Diez Gergonne

From Gergonne to Gargantua

Related toVariations

33



naming the position of the card \n 21 card trick with twenty seven cards, spectator can assemble the piles in any way \n unknown
1956

Naming the Position of the Card

34



bringing the card to a named position \n 21 card trick with twenty seven cards, spectator can name what the final position of the selection should be in the packet \n unknown \n walker's method \n thomas walker
1956

Bringing the Card to a Named Position

Variations

35



walker's method \n easier method for gergonne's pile problem, lets spectator name the position of the selected card \n thomas walker \n bringing the card to a named position \n unknown
1956
Thomas Walker

Walker's Method

Inspired by

36



naming the card \n 21 card trick with twenty seven cards, magician can name the selection at the end \n unknown
1956

Naming the Card

38



relation to ternary system \n 21 card trick with twenty seven cards, mathematical relation to ternary counting system \n mel stover \n gargantua's tenpile problem \n mel stover
1956
Mel Stover

Relation to Ternary System

Variations

39



gargantua's tenpile problem \n 21 card trick but done with ten billion playing cards \n mel stover \n relation to ternary system \n mel stover
1956
Mel Stover

Gargantua's Tenpile Problem

Inspired by

40



dice \n intro \n martin gardner
1956
Martin Gardner

Dice

42



magic with common objects \n chapter intro \n martin gardner
1956
Martin Gardner

Magic With Common Objects

42



guessing the total \n divination of sum of numbers from three dice \n unknown
1956

Guessing the Total

43



frank dodd's prediction \n number "selected" with dice is predicted by number of matches \n frank n. dodd \n the double steal \n frank n. dodd
1956
Frank N. Dodd

Frank Dodd's Prediction

Also published here

43



positional notation tricks \n divine the faces of three rolled dice after some mathematics \n unknown
1956

Positional Notation Tricks

44



hummer's die mystery \n magician uses dice to divine number thought of by spectator, principle is similar to 21 card trick / gergonne's pile problem. spectator thinks of a number between one and six, a die is put under performer's hand and without looking at it the performer shows three sides of the die several times and asks if the selected number is visible, number is eventually divined \n bob hummer \n devil's die \n jack yates
1956
Bob Hummer

Hummer's Die Mystery

Related to

45



dominoes \n intro \n martin gardner
1956
Martin Gardner

Dominoes

46



the break in the chain \n predict the two numbers at the ends of a long domino chain \n unknown
1956

The Break in the Chain

47



the row of thirteen \n spectator secret shifts around a number of dominoes from a row of thirteen dominoes, magician divines how many have been shifted \n unknown
1956

The Row of Thirteen

47



magic squares \n three by three square drawn on calendar, magician is told smallest number in square, can then divine total sum of the nine dates in the square \n unknown \n calendar conjuring \n tom sellers \n breathtaking \n stephen tucker
1956

Magic Squares

Related toVariations

48



gibson's circled dates \n five dates are circled on a calendar month, magician asks how many mondays/tuesdays... are circled, magician can divine the sum total of the circled dates \n walter b. gibson \n royal vale heath
1956
Walter B. Gibson, Royal Vale Heath

Gibson's Circled Dates

48



calendars \n intro \n martin gardner
1956
Martin Gardner

Calendars

48



stover's prediction \n four by four square drawn on calendar, four circles drawn (draw circle and cross out row and column each time), magician divines the sum, matrix force \n mel stover \n calendar prediction \n mel stover \n four on a date \n george kirkendall
1956
Mel Stover

Stover's Prediction

Also published here

49



calendar memorizing \n bibliography and suggested reading list for memorizing calendars \n martin gardner
1956
Martin Gardner

Calendar Memorizing

50



tapping the hours \n spectator think of any hour on the clock, magician tap the clock at random points, eventually will end counting on the thoughtof hour. variation by eddie joseph using blank cards with words \n unknown \n eddie joseph \n crazy time \n tom hamilton \n heath's "tappit" \n royal vale heath \n tapadrink \n martin gardner \n tapananimal \n martin gardner \n the riddle card \n martin gardner
1956
, Eddie Joseph

Tapping the Hours

Variations

50



die and watch mystery \n die is used to start counting clockwise and anticlockwise on a clock, count to thoughtof number, the two hours are added together and magician can divine the number on the die \n martin gardner
1956
Martin Gardner

Die and Watch Mystery

51



heath's bill trick \n serial number divination, very mathematical \n royal vale heath
1956
Royal Vale Heath

Heath's Bill Trick

52



the three heaps \n start with three heaps of matches, magician can (without looking) form a single pile of matches equal a number called out by spectator \n unknown \n welcome change \n jim steinmeyer \n zeitgeist \n jim steinmeyer \n the three piles divination \n unknown
1956

The Three Heaps

VariationsAlso published here

55



match folder mindreading \n divine thought of number with matchbook of twenty matches, spectator is instructed to tear out matches in some mathematical way \n fred demuth \n a divination with matches \n fred demuth
1956
Fred DeMuth

Match Folder Mindreading

Also published here

55



matches \n intro \n martin gardner
1956
Martin Gardner

Matches

55



the tramps and chickens \n using matches to tell story of tramps stealing chickens, matches seem to travel from hand to hand \n unknown
1956

The Tramps and Chickens

56



the purloined objects \n penny, ring, key distributed to three spectators. each spectator then takes a number of matches corresponding to some rules, magician then divines who has which object \n unknown \n three object divination \n nick trost
1956

The Purloined Objects

Related to

57



the nine mystery \n coins placed in a q shape, spectator counts clockwise and anticlockwise, predict the endpoint of the count \n unknown \n a penny for your thoughts \n stephen tucker \n the nine mystery \n unknown \n sticquers! \n gene nielsen
1956

The Nine Mystery

VariationsAlso published here

59



which hand? \n divining which hand holds dime and which hand holds penny \n unknown \n heath's variation \n royal vale heath
1956

Which Hand?

Variations

59



coins \n intro \n martin gardner
1956
Martin Gardner

Coins

59



heath's variation \n which hand, divine which hand holds nickel and which hand holds penny, required length of calculation as tell \n royal vale heath \n which hand? \n unknown \n the comparative uncertainty principle \n michael murray
1956
Royal Vale Heath

Heath's Variation

Inspired byRelated to

60



heads or tails? \n determine whether hidden coin is heads or tails after spectator has turned over the coins randomly, provides variation by walter gibson using pieces of colored cardboard \n unknown \n walter b. gibson \n colors by the numbers no. 1 \n ellison poland
1956
, Walter B. Gibson

Heads or Tails?

Variations

61



hummer's checker trick \n spectator moves three checker pieces around on the board via spelling, magician can divine the starting positions of the checker pieces \n bob hummer
1956
Bob Hummer

Hummer's Checker Trick

62



hummer's threeobject divination \n three objects switched around, spectator then thinks of one and switches the other two, magician can divine thought of object (mathematical 3 card monte 1951) \n bob hummer \n yates' fourobject divination \n jack yates \n mathematical 3card monte revisited \n john born \n strangers from two worlds \n stewart james
1956
Bob Hummer

Hummer's Threeobject Divination

Variations

63



yates' fourobject divination \n three matches facing one way and one match facing the opposite way. after moving matches around, magician correctly can divine which is the reversed match without looking \n jack yates \n hummer's threeobject divination \n bob hummer \n match miracle \n jack yates \n vier gegenstände \n jack yates
1956
Jack Yates

Yates' FourObject Divination

Inspired byAlso published here

66



topological tomfoolery \n chapter intro \n martin gardner
1956
Martin Gardner

Topological Tomfoolery

69



the afghan bands \n moebius strip used for magic, provides the basic method and a history/bibliography of the moebius strip in magic (afghan bands was named by prof hoffmann) \n various
1956
Various

The Afghan Bands

70



finger escape \n handkerchief wrapped around finger, penetrates finger, topological \n unknown
1956

Finger Escape

73



tabor's interlocked handkerchiefs \n two handkerchiefs wrapped around each other, penetrates through each other, topological \n edwin tabor
1956
Edwin Tabor

Tabor's Interlocked Handkerchiefs

76



knotty problems \n knot tied in handkerchief without letting go of either hand \n unknown
1956

Knotty Problems

80



string and rope \n intro \n martin gardner
1956
Martin Gardner

String and Rope

81



garter tricks \n pricking the garter, basic version, can use belt too \n unknown
1956

Garter Tricks

81



the giant's garter \n more complex version of pricking the garter using a closed loop of string \n unknown
1956

The Giant's Garter

82



more string tricks \n examples of knots in strings/ropes that can allow penetration effects or escape effects \n unknown
1956

More String Tricks

84



clothing \n chapter intro \n martin gardner
1956
Martin Gardner

Clothing

86



the puzzling loop \n topological puzzle, loop of rope can escape from loop formed by a person's arm (person must be wearing vest) \n unknown
1956

The Puzzling Loop

86



reversing the vest \n person wearing vest, hands are clasped together. vest can be turned inside out without unclasping hands. \n unknown
1956

Reversing the Vest

86



removing the vest \n vest can be removed from body without removing coat \n unknown
1956

Removing the Vest

87



rubber bands \n \n martin gardner
1956
Martin Gardner

Rubber Bands

91



the jumping band \n rubber band jumps from index finger to middle finger \n fred furman
1956
Fred Furman

The Jumping Band

91



the twisted band \n puzzle to remove the twists in a wide rubber band \n alex elmsley \n verdrehtes gumiband \n alex elmsley
1956
Alex Elmsley

The Twisted Band

Also published here

91



tricks with special equipment \n \n martin gardner
1956
Martin Gardner

Tricks With Special Equipment

95



number cards \n set of cards with numbers, spectator thinks of a number and chooses cards that has the thought of number. magician divines the number. binary system \n unknown \n window cards \n unknown
1956

Number Cards

Variations

95



window cards \n more complex version of number cards with holes cut out in the card to be stacked up \n unknown \n sam loyd's version \n sam lloyd \n number cards \n unknown
1956

Window Cards

Inspired byVariations

96



sam loyd's version \n new version of window cards that reveal your age \n sam lloyd \n window cards \n unknown
1956
Sam Lloyd

Sam Loyd's Version

Inspired by

100



crazy time \n tapping the hours but with a wooden board with holes in it \n tom hamilton \n tapping the hours \n unknown \n eddie joseph
1956
Tom Hamilton

Crazy Time

Inspired by

101



heath's "tappit" \n tapping the hours type of trick, but with colored tiles and numbers printed on them \n royal vale heath \n tapping the hours \n unknown \n eddie joseph
1956
Royal Vale Heath

Heath's "Tappit"

Inspired by

102



tapadrink \n tapping the hours but with names of different drinks in a clock shape \n martin gardner \n tapping the hours \n unknown \n eddie joseph
1956
Martin Gardner

Tapadrink

Inspired by

103



tapananimal \n tapping the hours but with animal names in a clock shape \n martin gardner \n tapping the hours \n unknown \n eddie joseph
1956
Martin Gardner

TapanAnimal

Inspired by

104



the riddle card \n tapping the hours type of trick with a card with riddles \n martin gardner \n tapping the hours \n unknown \n eddie joseph
1956
Martin Gardner

The Riddle Card

Inspired by

106



heath's "diciphering" \n five dice with different three digit numbers on each face. roll the dice, magician can very quickly give the sum of the numbers rolled \n royal vale heath \n ed balducci \n heath receipts \n michael weber \n tim trono
1956
Royal Vale Heath, Ed Balducci

Heath's "Diciphering"

Variations

106



sureshot dice box \n small box that allows dice in it to rattle but not turn over. includes trick by stewart james (sum prediction) \n eli hackman \n stewart james
1956
Eli Hackman, Stewart James

SureShot Dice Box

108



blyth's domino box \n dominoes in a box shifted, the spots on the dominoes will predict how many have been shifted \n will blyth \n blocks of india \n unknown
1956
Will Blyth

Blyth's Domino Box

Variations

110



blocks of india \n variation on blyth's domino box, uses colored dominoes \n unknown \n blyth's domino box \n will blyth
1956

Blocks of India

Inspired by

110



hummer tricks \n hummer's poker chip trick: numbered poker chips, magician can divine sum of the numbers on three concealed poker chips \n bob hummer
1956
Bob Hummer

Hummer Tricks

111



geometrical vanishes  part 1 \n chapter intro \n martin gardner
1956
Martin Gardner

Geometrical Vanishes  Part 1

114



the line paradox \n line vanishes when paper is shifted \n unknown
1956

The Line Paradox

114



sam loyd's flag puzzle \n geometrical vanish, cut an american flag into two pieces, rearrange to form onto thirteen stripes instead of fifteen \n sam lloyd
1956
Sam Lloyd

Sam Loyd's Flag Puzzle

117



the vanishing face \n geometrical vanish of a face \n unknown
1956

The Vanishing Face

118



"get off the earth" \n geometrical vanish of a chinese warrior by rotating paper globe \n sam lloyd
1956
Sam Lloyd

"Get Off The Earth"

118



deland's paradox \n geometrical vanish of a playing card \n theodore deland \n the vanishing rabbit \n martin gardner \n stover's variations \n mel stover
1956
Theodore DeLand

DeLand's Paradox

Variations

123



the vanishing rabbit \n geometrical vanish of a rabbit \n martin gardner \n deland's paradox \n theodore deland
1956
Martin Gardner

The Vanishing Rabbit

Inspired by

125



stover's variations \n geometrical vanish / transformation of objects, face becomes beer mug or red pencil becomes blue pencil \n mel stover \n deland's paradox \n theodore deland
1956
Mel Stover

Stover's Variations

Inspired by

125



the checkerboard paradox \n geometrical vanish of a square on a checkerboard \n unknown
1956

The Checkerboard Paradox

129



hooper's paradox \n rectangle rearranged to apparently increase the area \n william hooper
1956
William Hooper

Hooper's Paradox

131



square variation \n area of square changes after pieces are rearranged \n unknown
1956

Square Variation

132



fibonacci series \n about the mathematics behind geometrical vanishes where the area of a shape changes. based on work by v. schlegel, e.b. escott and lewis carroll \n martin gardner \n v. schlegel, zeitschrift fur mathematik und physik, vol. 24, p. 123 (1879) \n e. b. escott, open court, vol. 21, p. 502 (1907) \n langman's version \n harry langman
1956
Martin Gardner

Fibonacci Series

Related to V. Schlegel, Zeitschrift fur Mathematik und Physik, Vol. 24, p. 123 (1879)
 E. B. Escott, Open Court, Vol. 21, p. 502 (1907)
Variations

134



langman's version \n rectangle changes in area when pieces are moved around, related to fibonacci series \n harry langman \n fibonacci series \n martin gardner
1956
Harry Langman

Langman's Version

Inspired by

137



curry's paradox \n various geometrical vanishes of squares in rectangles and squares \n paul curry \n curry triangles \n martin gardner \n torn uncut card sheet \n tomas blomberg
1956
Paul Curry

Curry's Paradox

Variations

139



curry triangles \n geometrical vanishes with triangles \n martin gardner \n curry's paradox \n paul curry
1956
Martin Gardner

Curry Triangles

Inspired by

145



fourpiece squares \n cut square into four pieces, rearrange to get hole \n unknown
1956

Fourpiece Squares

151



threepiece squares \n cut square into three pieces, rearrange to get hole \n paul curry
1956
Paul Curry

Threepiece Squares

153



twopiece squares \n cut square into two pieces, rearrange to get hole \n paul curry \n martin gardner
1956
Paul Curry, Martin Gardner

Twopiece Squares

153



curved and 3d forms \n discusses the possibilities of geometrical vanishes with 3d shapes \n martin gardner
1956
Martin Gardner

Curved and 3D Forms

155



magic with pure numbers \n chapter intro \n martin gardner
1956
Martin Gardner

Magic with Pure Numbers

156



rapid cube root extraction \n find cube roots of numbers very quickly, mental calculation \n unknown
1956

Rapid Cube Root Extraction

157



adding a fibonacci series \n add up ten fibonacci numbers very quickly, mental calculation \n unknown
1956

Adding a Fibonacci Series

158



predicting a number \n think of a number, do some operations, predict final result \n unknown
1956

Predicting a Number

159



curry's version \n think of a number, do some operations, predict final result, better presentation \n paul curry
1956
Paul Curry

Curry's Version

160



al baker's version \n predict sum of numbers \n al baker
1956
Al Baker

Al Baker's Version

160



divining a number \n divining final answer of a series of calculations, required length of calculation as tell \n unknown
1956

Divining a Number

161



the mysteries of nine \n number forces using the number nine (e.g. 1089), includes variation by t. o'connor sloane using money \n t. o'connor sloane \n 6801 prediction \n steve beam
1956
T. O'Connor Sloane

The Mysteries of Nine

Related to

163



digital roots \n number force using digital roots \n unknown \n persistent root \n unknown \n guessing someone's age \n unknown \n an addition trick \n unknown \n a multiplication trick \n unknown
1956

Digital Roots

Related to

164



persistent root \n number force using digital roots of nine \n unknown \n digital roots \n unknown
1956

Persistent Root

Related to

165



guessing someone's age \n using digital roots to estimate the age of someone \n unknown \n digital roots \n unknown \n just a few wrinkles... \n stephen tucker
1956

Guessing Someone's Age

Related toVariations

166



an addition trick \n divine digit that is not named in a long number using digital roots \n unknown \n digital roots \n unknown
1956

An Addition Trick

Related to

167



a multiplication trick \n divine digit that is not named in a long number using digital roots \n unknown \n digital roots \n unknown
1956

A Multiplication Trick

Related to

167



the mysteries of seven \n explains why the number nine has such weird properties \n martin gardner
1956
Martin Gardner

The Mysteries of Seven

168



predicting a sum \n magician correctly predicts sum of numbers generated by spectator and magician \n unknown \n al baker's numero \n al baker
1956

Predicting a Sum

Variations

170



al baker's numero \n convert the final sum into a word, which becomes the name of the spectator \n al baker \n predicting a sum \n unknown
1956
Al Baker

Al Baker's Numero

Inspired by

172



psychological forces \n psychological forces with psychologically appealing numbers (37, 68) \n unknown \n mental marvels \n albert cohn
1956

Psychological Forces

Related to

173


