| 1,036 puzzels super sudoku by Frank Longo - 2006 - 352 pages |
| 1,10,100...Sudoku - 2005 - 192 pages |
| 100 games of logic by Pierre Berloquin - 1977 - 145 pages |
| 100 games of logic by Pierre Berloquin - 1977 - 145 pages |
| 100 perceptual puzzles by Pierre Berloquin - 1995 - 155 pages |
| 1000 questions and answers by John Cooper - 1995 - 192 pages |
| 1001 things to spot in the town - 2000 - 32 pages |
| 101 best party quiz games by Jack Shafer - 1958 - 156 pages |
| 101 IQ Building Word Games by Mayme Allen, Janine Kelsch - 2003 - 128 pages |
| 101 Puzzles in Thought and Logic by C. R. Wylie, Jr. - 1957 - 125 pages |
| 101 Puzzles, Riddles and Rhymes for Cat Lovers by Hyla Hope Harder - 2009 - 112 pages |
| 125 Brain Games for Babies by Jackie Silberg - 2001 - 143 pages |
| 150 puzzles in crypt-arithmetic by Maxey Brooke - 1969 - 72 pages |
| 150 puzzles in crypt-arithmetic by Maxey Brooke - 1963 - 72 pages |
| 2-minute Brainteasers by Alan Stillson - 2005 - 96 pages |
| 2nd miscellany of puzzles by Stephen Barr - 1969 - 224 pages |
| 3-D Puzzles by Roger Kean, Oliver Frey - 1995 - 36 pages |
| 3-D Space Mazes by P. A. Heuser - 2011 - 48 pages |
| 3-D Space Mazes by P. A. Heuser - 2011 - 48 pages |
| 30 miao zhi li kai fa. Tu hua ben by Yu-xin Liu, Long-han Liu - 1994 - 121 pages |
| 365 Exercises For The Mind by Pierre Berloquin - 2004 - 426 pages |
| 365 Exercises for the Mind by Pierre Berloquin - 1998 - 426 pages |
| 38 Jumble by Henri Arnold, Bob Lee - 1989 - 124 pages |
| 3D fun by Roger Kean, Oliver Frey - 1995 - 36 pages |
| 3D spot what! by Rowan Summers - 2006 - 96 pages |
| 40% Off Is the New Black by Lisa Birnbach, Patricia Marx - 2009 - 208 pages |
| 50 amazing U.S. puzzles by Dan Nevins - 1996 - 64 pages |
| 500 Acertijos O Adivinanzas/500 Riddles or Puzzles by Víctor Villegas - 1999 - 76 pages |
| 536 curious problems and puzzles by Henry Ernest Dudeney, Martin Gardner - 1995 - 428 pages |
| 536 puzzles & curious problems by Henry Ernest Dudeney - 1967 - 428 pages |
| 536 puzzles & curious problems by Henry Ernest Dudeney - 1967 - 428 pages |
| 7 Little Words Book 2 by Christopher York, Blue Ox Technologies Ltd. - 2013 - 112 pages |
| A day at school by Gina Shaw - 1996 - 24 pages |
| A Key to puzzledom ; or, Complete handbook of the enigmatic art by National Puzzlers' League (U.S.) - 1906 - 145 pages |
| A Lifetime of Puzzles by Erik D. Demaine, Martin L. Demaine, Tom Rodgers - 2008 - 349 pages |
| A meaning to the maze by Michael Ayrton - 1974 - 19 pages |
| A Quirky Quiz Book by Anthony John Lowes - 2006 |
| A study of puzzles with special reference to the psychology of mental adaptation by Ernest Hiram Lindley - 1897 - 493 pages |
| A thousand and one things to spot long ago by Gillian Doherty, Teri Gower - 1999 - 31 pages |
| A toy chest of mazes and fun - 1996 |
| A world of puzzles by Lilly Library (Indiana University, Bloomington), Jerry Slocum, Jillian Hinchliffe - 2006 - 32 pages |
| A-maze-ing roller coaster mazes by Tony Tallarico - 2002 - 32 pages |
| Absolute Sudoku by Masha Zager - 2006 - 304 pages |
| Acting charades - 1924 - 93 pages |
| Addlegrams by Christopher Jettison (Admiral, pseud.) - 1934 - 114 pages |
| Adrian Fisher's Quick Mazes by Adrian Fisher - 2011 - 96 pages |
| Advanced Sudoku and Other Japanese Mind Puzzles by Thunder's Mouth Press - 2005 - 125 pages |
| African American Men Struggle to Seek God by Melba Eldge-Lewis - 2006 - 100 pages |
| Alicia en el País de las Adivinanzas by Raymond M. Smullyan, Raymond Smullyan - 1989 - 208 pages |
| All-Star Mathlete Puzzles by Dick Hess - 2009 - 94 pages |
| Almost Impossible Brain Bafflers by Tim Sole, Rod Marshall - 2006 - 94 pages |
| Almost Impossible Number Puzzles by The Puzzle Society - 2009 - 192 pages |
| Almost Impossible Word Puzzles by The Puzzle Society - 2009 - 192 pages |
| Amazeing ruins by Dion Hamill - 2004 |
| Amazing "Aha!" Puzzles by Lloyd King - 2004 - 180 pages |
| Amazing "Aha!" Puzzles by Lloyd King - 2004 - 180 pages |
| Amazing Bible Word Searches for Kids by Richard Spiering, Ruth Spiering - 2011 - 176 pages |
| Amazing mazes by Wendy Madgwick, Robert Neddon, Dugald Steer - 2002 - 96 pages |
| Amazing Mazes 3 by Heimann - 1997 - 32 pages |
| Amazing mazes collection by Rolf Heimann - 2001 - 96 pages |
| Amazing Mazes for Kids by Steve Miller, Becky Miller - 1998 - 160 pages |
| Amazing spot what! by Nick Bryant - 2002 - 31 pages |
| Amusements in Mathematics by Henry Ernest Dudeney - 1958 - 258 pages |
| Amusements in mathematics by Henry Ernest Dudeney - 1917 - 258 pages |
| An Almanac of words at play by Willard R. Espy - 1975 - 360 pages |
| Ancient puzzles by Dominic Olivastro - 1993 - 280 pages |
| Animal mazes by Kim Blundell, Jenny Tyler - 1998 - 24 pages |
| Animal Puzzles for the Scroll Saw by Judith S. Peterson, Dave Peterson - 2009 - 122 pages |
| Are we there yet? by Helene Hovanec, Jim Gallagher - 1996 - 62 pages |
| Are You a Genius? by Robert A. Streeter, Robert G. Hoehn - 2002 - 108 pages |
| Arithmetic : warm up by Anita Harnadek - 1989 - 28 pages |
| Art Puzzles by Number by Kathy Weaver - 2001 - 128 pages |
| Artful Anagrams Puzzle Book by P. N. Polsky - 2007 - 64 pages |
| Ask me another! - 1927 - 192 pages |
| Astounding Acrostic Puzzles by Anne Brown - 2005 - 96 pages |
| Back to school activity fun by Rita Hoppert - 1997 - 144 pages |
| Balance Quest by Whit Mcmahan - 2012 |
| Be Your Own Napoleon by William Seymour - 1988 - 338 pages |
| Beef Up Your Brain EB by Michel Noir - 2009 - 320 pages |
| Beeton's book of drawing-room plays, acting charades, riddles, enigmas, rebuses, etc. ... by Samuel Orchart Beeton - 149 pages |
| Beyond the quantum paradox by Lazar Mayants - 1994 - 105 pages |
| Beyond the Quantum Paradox by Lazar Mayants - 1994 - 105 pages |
| Bible Baseball by Robert T. Taylor - 1983 |
| Bible Jumble by Christopher Hudson, Tyndale, Anna Floit - 2009 - 224 pages |
| Bible Scrambles by Ken Save, Vickie Save - 2001 - 192 pages |
| Bible Trivia for Kids by Steve Miller, Becky Miller - 1999 - 168 pages |
| Big Book of Acrostics by Michael Ashley - 2008 - 128 pages |
| Big Book of Acrostics 2 by Michael Ashley - 2008 - 127 pages |
| Big Book of Mazes & Labyrinths by Walter Shepherd - 1973 - 112 pages |
| Big Magic Number Puzzles by Allyne Brumbaugh - 1995 - 79 pages |
| Biggest Book of Games for One Ever by Robert Allen - 2005 - 400 pages |
| Black and white by David Macaulay - 1990 - 32 pages |
| Bones against boredom by Betsy Howie - 2000 - 48 pages |
| Book without a title by Kit Williams - 1984 - 32 pages |
| Boredom blasters by Susan Todd - 2000 - 88 pages |
| Botticelli and beyond by David Sidney Parlett - 1982 - 235 pages |
| Brain building games by Allen D. Bragdon, David Gamon - 2002 - 223 pages |
| Brain Pops-Cryptograms by Adams Media, Adams Media Corporation Staff - 2005 - 92 pages |
| Brain puzzler's delight by Eric Revell Emmet - 1968 - 254 pages |
| Brain Strains: Power Puzzles by Frank Coussement, Peter De Schepper, Keith Kay, Paul Sloane, Des MacHale, Norman D. Willis - 2003 - 352 pages |
| Brain Teasers by Ian Livingstone, Jamie Thomson - 2009 - 250 pages |
| Brain Teasers by Ian Livingstone, Jamie Thomson - 2009 - 250 pages |
| Brain teasers by World Book, Inc - 1996 - 32 pages |
| Brain Teasers by Ravi Narula - 1976 - 228 pages |
| Brain Teasers & Squeezers by Mary Rosenberg - 2000 - 80 pages |
| Brain-boosting quantum puzzles - 2002 - 192 pages |
| Brain-busters by Abbie F. Salny - 1984 - 111 pages |
| Brain-Busting Lateral Thinking Puzzles by Paul Sloane, Des MacHale, Myron Miller - 2004 - 192 pages |
| Brain-Flexing Balance Problems & Other Puzzles by Ivan Moscovich - 2006 - 128 pages |
| Brain-Flexing IQ Tests by Fraser Simpson - 2002 - 96 pages |
| BrainSnack Visual Mind Teasers by Peter De Schepper, Frank Coussement - 2008 - 400 pages |
| Brainstorms by Don Rubin, Roger Jones - 1988 - 127 pages |
| Brainstrains by Frank Coussement, Peter De Schepper, Keith Kay - 2004 - 352 pages |
| Brainstrains: Brainsnack Puzzles by Frank Coussement, Peter De Schepper - 2002 - 96 pages |
| Brainteasers by Derrick Niederman - 2003 - 96 pages |
| Brainteasers and mindbenders by Ben Hamilton - 1981 - 193 pages |
| Brainteasers on the Flip Side by Dave Tuller, Michael Rios - 2007 - 320 pages |
| Building left-brain power by Allen D. Bragdon - 2000 - 311 pages |
| Caliban's problem book by Hubert Phillips - 1961 - 180 pages |
| Can you answer it? - 1931 - 56 pages |
| Card Games Around the World by Sid Sackson - 1994 - 176 pages |
| Celtic Mazes by Dave Phillips - 1998 - 48 pages |
| Cerebral Torment by Vince Tucker - 1992 - 198 pages |
| Challenging Brain Boosters by Donatella Bergamino - 2004 - 191 pages |
| Challenging Cryptograms by Helen Nash - 1994 - 128 pages |
| Challenging Mazes by Lee Daniel Quinn - 1975 - 64 pages |
| Check your wits! by Jules Leopold - 1948 - 243 pages |
| Chinese brain twisters by Baifang - 2001 - 118 pages |
| Chinese Crosswords by Tong Yan, Ying Fu - 2007 - 186 pages |
| Christmas by Suzanne Ross - 2003 - 64 pages |
| Circus animals by California Fig Syrup Co, Sterling Products, Inc - 1925 - 12 pages |
| Citymaze! by Wendy Madgwick - 1997 - 47 pages |
| Citymaze! : a collection of amazing city mazes by Wendy Madgwick - 1998 |
| Classic Brain Twisters by Derrick Niederman, Jaime Poniachik, Tim Sole, Lea Poniachik, Rod Marshall - 2005 - 288 pages |
| Classic conundrums by Kenneth A. Russell - 1999 - 167 pages |
| Classic Cryptograms by Leslie Billig - 2005 - 288 pages |
| Classic Lateral Thinking Puzz by Edward J. Harshman, Des MacHale, Paul Sloane - 2003 - 278 pages |
| Classic Logic Puzzles by J.J. Mendoza Fernandez, George J. Summers, Norman D. Willis - 2003 - 288 pages |
| Classroom proven motivational mathematics games by Michigan Council of Teachers of Mathematics. Guidelines Committee - 1971 - 52 pages |
| Clifford's Halloween puzzles by Norman Bridwell - 1994 - 32 pages |
| Codes & ciphers by David J. Bodycombe - 2002 - 122 pages |
| Codes, Ciphers and Secret Writing by Martin Gardner - 1972 - 96 pages |
| Coffee Time by Patrick Merrell, Helene Hovanec - 2007 - 320 pages |
| Collins Cricket Quiz Book by Collins - 2012 - 224 pages |
| Collins Football Quiz Book by Collins - 2012 - 224 pages |
| Collins Sports Quiz Book by Collins - 2012 - 224 pages |
| Colorful Lateral Thinking Puzz by Paul Sloane, Des MacHale - 2004 - 96 pages |
| Como Se Llama Este Libro / What is the Name of this Book? by Raymond M. Smullyan - 2004 - 292 pages |
| Comparables by Bill Jeakle, Ed Wyatt - 1992 - 99 pages |
| Conquer That Cube by Czes Kosńiowski - 1981 - 32 pages |
| Conundrums by Dean Rivers - 1905 - 155 pages |
| Crack the Codeword 1 by Catherine Eagleson - 2012 |
| Crazy for Sudoku by Lee Judson, calibre (0.7.8) [http://calibre-ebook.com] - 2010 |
| Crazy for Sudoku by Lee Judson, calibre (0.7.8) [http://calibre-ebook.com] - 2010 |
| Creative puzzles of the world by Pieter van Delft, Jack Botermans - 1978 - 200 pages |
| Creative puzzles of the world by Pieter van Delft, Jack Botermans - 1978 - 200 pages |
| Crime and puzzlement, my Cousin Phoebe by Lawrence Treat - 1991 - 64 pages |
| Critical Thinking Puzs by Michael Anthony DiSpezio - 1996 - 96 pages |
| Critical Thinking Puzzles by Michael A DiSpezio - 1996 - 88 pages |
| Critical Thinking Social Studies by Pamela Amick Klawitter - 2004 - 64 pages |
| Cryptogram A Day Bk by Louise B. Moll - 1996 - 128 pages |
| Cryptograms and Spygrams by Norma Gleason - 1981 - 112 pages |
| Cryptograms on the Flip Side by Leslie Billig, Shawn Kennedy - 2007 - 320 pages |
| Cryptorunes by Clifford A. Pickover - 2000 - 99 pages |
| Cubik Year by Honabe - 2004 - 172 pages |
| Cunning Lateral Thinking Puzzles by Paul Sloane, Des MacHale - 2006 - 95 pages |
| Das Astarte-Quadrat by Hans-Peter Mathys - 2008 - 207 pages |
| Data Structure Puzzles by Narasimha Karumanchi - 2011 - 538 pages |
| Dazzling Mazes by Ulrich Koch - 1985 - 76 pages |
| Dead Men Do Tell Tales by Sherban Young - 2010 - 158 pages |
| Debonair Hangman by Mike Ward - 2009 - 128 pages |
| Definition Scramble vol. 1 by Randy Zimmerman - 2012 - 127 pages |
| Dentro e fuori il labirinto by Francesca Romana Lepore - 2002 - 191 pages |
| Design Your Own Coat of Arms by Rosemary A. Chorzempa - 1987 - 48 pages |
| Detectograms and Other Puzzles by Harold Austin Ripley, Frederic Gregory Hartswick - 1988 - 96 pages |
| Deviously Difficult by Ivan Moscovich - 2005 - 127 pages |
| Die Suche nach dem Labyrinth by Joseph Leo Koerner - 1983 - 231 pages |
| Dilbert Sudoku Comic Digest by Scott Adams, The Puzzle Society - 2008 - 296 pages |
| Dinosaur funbook - 1979 - 48 pages |
| Dinosaur jokes & riddles by Jeffrey S. Nelsen - 1988 - 24 pages |
| Dinosaur Mazes by Patricia J. Wynne - 1992 - 64 pages |
| Dinosaur Mazes by Patricia J. Wynne - 1992 - 64 pages |
| Dinosaur Mazes by Patricia J. Wynne - 1992 - 64 pages |
| Dinosaur Mazes by Patricia J. Wynne - 1992 - 64 pages |
| Dinosaur Mazes by Patricia J. Wynne - 1992 - 64 pages |
| Dinosaur treks by Douglas Palmer - 2005 |
| Dipapadi tsa Sesotho by Zacharias Aunyane Matŝela - 1987 - 145 pages |
| Discover how stuff works by Peter Dennis - 2005 - 31 pages |
| Discover your IQ potential: unlock the power of your mind by Ken Russel, Philip Carter - 2003 - 208 pages |
| Disney pirates of the Caribbean by Publications International - 2006 |
| Disney's Aladdin - 1996 - 24 pages |
| Disney's Oliver & company - 1996 |
| Disney's The Lion King by Colette Moran, Jaime Diaz Studios - 1999 |
| Domino games and domino puzzles by K. W. H. Leeflang - 1972 - 150 pages |
| Double-crostics - 1934 |
| Droid's dilemma by Roger Hufford - 1982 - 84 pages |
| Dumb jokes for smart kids by Lucy Jordon - 2000 - 96 pages |
| Easy number tricks by Joseph Clifton Brown - 1936 - 53 pages |
| Einstein's Riddle by Jeremy Stangroom - 2009 - 144 pages |
| Encyclopaedia Divine by Alejandro Melchor - 2002 - 64 pages |