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This is a tantalising and challenging collection of logic problems presented with buoyant humour by the incomparable Raymond Smullyan. Smullyan was a mathematician of considerable standing, and this shows in the rigour of the logic and contradictions explored. His next book, Alice in Puzzleland was perhaps even more delightful and funny. Keen 15-17 year maths students love these problems, and they make a wonderful reward for hard work on less amusing material.
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