New York Post Train Your Brain Su Doku: Fiendish
Gould, Wayne
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The Little Pink Book of Kenken : Easy to Hard Logic Puzzles
Shortz, Will
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New York Post Train Your Brain Su Doku: Difficult
Gould, Wayne
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Sideways Arithmetic from Wayside School
Sachar, Louis
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New York Post Train Your Brain Su Doku: Medium
Gould, Wayne
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Challenging Brainteasers
Santos, Bernardo Recaman
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Su Doku : The Official Utterly Addictive Number-Placing Puzzle
None
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Sit and Solve Hard Sudoku
Rios, Michael
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The New York Times Will Shortz Presents Challenging KenKen : 300 Logic Puzzles That Make You Smarter
Shortz, Will
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The New York Times Will Shortz Presents Diabolical KenKen : 300 Logic Puzzles That Make You Smarter
Shortz, Will
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New York Post Guru Su Doku : 150 Fiendish Puzzles
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Apprentice Su Doku : 150 Easy to Medium Puzzles
None
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Will Shortz Presents Ferocious KenKen : 200 Challenging Logic Puzzles That Make You Smarter
Shortz, Will
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Will Shortz Presents Tame KenKen : 200 Easy Logic Puzzles That Make You Smarter
Shortz, Will
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Cows in the Maze : And Other Mathematical Explorations
Stewart, Ian
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Will Shortz Presents KenKen for Stress Relief : 100 Easy to Hard Logic Puzzles That Make You Smarter
Shortz, Will
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Will Shortz Presents KenKen for Your Coffee Break : 100 Challenging Logic Puzzles That Make You Smarter
Shortz, Will
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KenKen by the Seaside : 100 Easy to Hard Logic Puzzles That Make You Smarter
Miyamoto, Tetsuya
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The Lady or the Tiger? : And Other Logic Puzzles
Smullyan, Raymond M.
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Satan, Cantor and Infinity : Mind-Boggling Puzzles
Smullyan, Raymond M.
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The Dangerous Book of Sudoku : 100 Wordless Crossword Puzzles
Shortz, Will
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Ferociously Fun Sudoku : 200 Easy Puzzles
Shortz, Will
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Fearsomely Frightful Sudoku : 200 Medium Puzzles
Shortz, Will
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Easy-to-Hard Mensa Sudoku
Longo, Frank
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USA TODAY Sudoku X and Mini Sudoku : 200 Puzzles from the Nations No. 1 Newspaper
USA Today Staff
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50 Fill-In Math Word Problems : Engaging Stories for Students to Read, Fill In, Solve, and Sharpen Their Math Skills
Krech, Bob
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The Big Book of Sudoku for Dummies
Heron, Andrew
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Number Freaking : How to Change the World with Delightfully Surreal Statistics
Rimmer, Gary
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