Novice solvers can become master sleuths with these 70 puzzles, riddles, and enigmas from the world's most brilliant detective. Sharpen your wits with these 70 specially commissioned puzzles, riddles, and enigmas, all grouped by difficulty and concocted by the one detective who needs no introduction: Mr. Sherlock Holmes. Dr. John Watson, Holmes's friend and companion, has assembled this collection of challenges so you can test your analytic abilities, sharpen your wits, and hone your deductive reasoning as you go along.