[en] Escape the Game Smashwords Edition
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[en] Can You Solve My Problems? · A Casebook of Ingenious, Perplexing and Totally Satisfying Puzzles Guardian Faber Publishing
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[en] [Very Short Introductions 01] • Game Theory Oxford University Press, USA
[en] The Why of Things · Causality in Science, Medicine, and Life Columbia University Press
[en] Taking Sudoku Seriously · The Math Behind the World's Most Popular Pencil Puzzle Oxford University Press, USA
[en] Conceptual Mathematics · A First Introduction to Categories Cambridge University Press
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[en] [Gutenberg 63598] • The Essentials of Logic, Being Ten Lectures on Judgment and Inference RareBooksClub.com
[en] Brain Candy · Science, Paradoxes, Puzzles, Logic, and Illogic to Nourish Your Neurons Three Rivers Press
[en] The Fallacy Detective · Thirty-Eight Lessons on How to Recognize Bad Reasoning Christian Logic
[it] Tutte Le Opere Newton Compton
[en] [Gutenberg 6560] • Deductive Logic Createspace Independent Publishing Platform
[en] [Gutenberg 30866] • Analysis of Mr. Mill's System of Logic Public Domain Books
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