The Ultimate Mathematical Challenge: Over 365 puzzles to test your wits and excite your mind by The UK Mathematics T... 2018-10-22

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The Mammoth Book of Codeword Puzzles: Crack the code and solve the puzzle by Puzzle Press, 9781472145055 2019-12-05

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Puzzle Baron's Logic Puzzles, Volume 3 by Stephen P Ryder, 9781465454652 2016-11-08

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Puzzle Baron's Logic Puzzles by Puzzle Baron, 9781615640324 2010-08-00

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The Escape Book: Can you escape this book? by Ivan Tapia, 9781781317433 2018-01-02

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The Times MindGames Number and Logic Puzzles Book 1: 500 brain-crunching puzzles, featuring 7 popular mind games by ... 2016-09-19

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Absolutely Nasty (R) Kakuro Level One by Conceptis Puzzles, 9781402799891 2013-04-02

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Absolutely Nasty (R) Kakuro Level Two by Conceptis Puzzles, 9781402799907 2013-04-02

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The Times Codeword 9: 200 cracking logic puzzles by The Times Mind Games, 9780008241247 2018-04-30

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Green Belt Kakuro: 150 Puzzles by Conceptis Puzzles, 9781402739347 2006-08-28

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Brown Belt Kakuro: 150 Puzzles by Conceptis Puzzles, 9781402739354 2006-08-28

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Cracking Codes and Cryptograms For Dummies by Denise Sutherland, 9780470591000 2009-10-16

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The Floor is Lava: and 99 more games for kids and families to play by Ivan Brett, 9781472257505 2019-07-09

Absolutely Nasty (R) Kakuro Level Three by Conceptis Puzzles, 9781402799914 2013-04-02

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The Monographs: A Comprehensive Manual on All You Need to Know to Become an Expert Deductionist. by Ben Cardall, 978... 

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MENSA CHALLENGE YOUR BRAIN MATH LOG, 9781402714498 2005-10-01

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The Original Area Mazes by Naoki Inaba, 9781615194216 

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Codex Enigmatum: Unique and eccentric brain teasers, puzzles and enigmas by Rami Hansenne, 9789463960236 

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Little Moments of Joy Adult Activity Book: Includes Easy Puzzles, Coloring Pages, Brain Games, Writing Activities, S... 

Black Belt Kakuro: 150 Puzzles by Conceptis Puzzles, 9781402739361 2006-08-28

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Word Play: A cornucopia of puns, anagrams and other contortions and curiosities of the English language by Gyles Bra... 2016-08-25

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Brown Belt KenKen (R) by Tetsuya Miyamoto, 9781454904199 2013-03-05

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Tarquin Mathematical Challenges: An alphabet of tasks and teasers by John Plant, 9781907550294 2014-02-01

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You Gotta be Kidding!: The Wacky Book of Mind-Boggling Questions by Randy Horn, 9780761143659 2006-10-25

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The Ultimate Book of Optical Illusions by Al Seckel, 9781402734045 2006-09-28

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The Escape Book 2: Can you escape this book? by Ivan Tapia, 9781781319529 2019-10-01

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240 Variety Puzzle Book 1: Word Search, Sudoku, Code Word and Word Fill-In for Effective Brain Exercise! by Jaja Boo... 

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Jumble (R) Galaxy: A Universe of Challenging Puzzles by Tribune Media Services, 9781600785832 2011-10-01

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Second-Degree Black Belt Kakuro by Conceptis Puzzles, 9781402787973 2012-03-01

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Will Shortz Presents Ferocious KenKen: 200 Challenging Logic Puzzles That Make You Smarter by Will Shortz, 978031259... 2009-09-15