Mensa - Riddles & Conundrums(English, Paperback, Allen Robert)
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Riddles and Conundrums is a fiendish, unstructured collection of riddles, lateral thinking problems, conundrums, mind mazes, posers and baffling brain twisters. Dip in anytime and solve a puzzle or two, or work your way through over 100 games and puzzles to strengthen your brain power.