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"Another scintillating collection of brilliant problems and paradoxes by the most entertaining logician and set theorist who ever lived. As in all of Professor Smullyan's fantastic puzzle books, you end up exploring that strange subterranean region below mathematics, where Godelian corridors lead in all directions to beautiful theorems about truth and provability." -- Martin Gardner

Join the ranks of the geniuses, and leave behind the merely brilliant! Try to figure out 20 tough types of puzzles like the ones found at international puzzle competitions. These are puzzles that require no verbal skills to solve; you just need your logical brain. How hard can they be? Simple arithmetic and a sharp pencil (with a full eraser) are all you need, plus paying close, close attention.

An obsessive collection of 1,000 challenges, puzzles, riddles, illusions-both original as well as must-do classics. Jam-packed on the page and illustrated throughout in full-color, with a visual for each entry, the book, opened anywhere, is like a call to action.

Paul Sloane's seventh book in the series, is as fresh and clever as the first, and is perfect for anyone who enjoys solving mysteries as much as they enjoy reading them.