Puzzle Books
Various puzzle books to keep your brain fit.
Mensa Guide to Solving Sudoku
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Learn to solve complex Sudoku with hidden pairs, naked pairs, X-wings, jellyfish, squirmbag, bivalue and bilocation graphs, turbot fish, grid coloring, chains, etc.
Aha!: Aha! Insight and Aha! Gotcha
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Two books in this single volume will give you 144 Aha puzzles that ranges from geometry, logic, statistics, word play, and more. Puzzle may seem difficult, until you got the Aha moment.
Puzzles for Programmers and Pros
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Good practice of puzzle-solving skills for job interviews that ask puzzle questions. Some of you who have had programming interviews will know that type of questions.
