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Rating: 
Summary: An overlooked gem
Review: I find it surprising that this book is almost unknown and out of print. This collection of logic puzzles is easily one of the best ever written. Starting with a small set of lighthearted teasers, continuing with progressively more serious problems, including probably the most complete variations on liar/knight and metapuzzle themes, and finishing with the best amateur level introduction to "serious" mathematical logic I have ever seen. The ideas are presented with amazing clarity and in the form digestible to the most casual reader, preserving the beauty but without compromising the essence of the arguments. Don't let this one get away if you can find a copy.
Rating:
Summary: more logic puzzles
Review: What a shame that this book is out of print. It is another of Raymond Smullyan's wonderful logic puzzle books; one that I found almost as challenging as To Mock a Mockingbird. Smullyan is a first rate mathematician, and it is quite a testiment to him that he is able to construct these logic puzzles that are both lots of fun to solve and also teach non-mathematicians how to think about serious logical issues. I found this book at a garage sale. Maybe you'll be lucky too!
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