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There are 17 squares in the logo

The Mammoth Book of Brain Teasers
Over 400 all new puzzles
$13.95

More than 400 all-new mind-bending puzzles from one of the world’s leading puzzle masters, ranging from basic brain-teasers to baffling brain-tormenters. The collection includes word-play, logic problems, math conundrums, and visual/spatial challenges.

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