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Novice solvers can become master sleuths with these 70 puzzles, riddles, and enigmas from the world's most brilliant detective: Mr. Sherlock Holmes. Dr. John Watson, Holmes's friend and companion, has assembled this collection of rudimentary challenges. The conundrums are all grouped by difficulty so you can test your analytic abilities, sharpen your wits, and hone your deductive reasoning as you go along.