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Sleuth & Solve: 20+ Mind...
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The Cursed Castle: An Escape...
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Sleuth & Solve: Spooky:...
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Games for Your Mind: The...
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A Cabinet of Philosophical...
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The Riddle of Scheherazade:...
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Hey Riddle Riddle: 300...
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Alice in Puzzleland: A...
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Space Puzzles
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The Math Maze: Solve Your Way...
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Four Lives: A Celebration of...
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Is Your Neighbor a Zombie?:...
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How To Play Sudoku: Your Step...
Howexpert
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Pyramid Puzzles
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Wrinklies Logic Puzzles:...
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The Magic Garden Of George B...
Raymond M Smullyan
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Increase Your Puzzle IQ: Tips...
Marcel Danesi, PH.D.
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Project Logic: Be Creative!:...
Izzi Howell
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Project Logic: Prove It!: How...
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Global Solution For Sudoku
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The Lady or the Tiger?
Raymond Smullyan
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To Mock a Mocking Bird
Raymond Smullyan
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