World's Hardest Puzzles

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Match your mind with the world's greatest brains! If you can match minds with the greatest brains, then you have a chance of solving these puzzles. Try this one

The World's 200 Hardest Brain Teasers

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FLEX YOUR brain power like never before! From acclaimed author Dr. Gary Gruber, whose proven critical-thinking methods have sold more than seven million books,

World's Hardest Puzzles

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Ai Escargot

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This book contains AI Escargot, the world famous sudoku puzzle which became the most difficult sudoku puzzle known in 2006. There are also several hints for sol

Maze

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This is not really a book. This is a building in the shape of a book...a maze. Each numbered page depicts a room in the maze. Tempted? Test your wits against mi