 Penrose Tiles to Trapdoor Ciphers by Martin Gardner |  Mathematical Magic Show by Martin Gardner |  The Second Scientific American Book of Mathematical Puzzles and Diversions by Martin Gardner |  Mathematics, Magic and Mystery by Martin Gardner |  Wheels, Life, and Other Mathematical Amusements by Martin Gardner |  Mathematical Carnival by Martin Gardner |  The Incredible Dr. Matrix by Martin Gardner |  Mathematical Circus by Martin Gardner |  The Last Recreations by Martin Gardner |  Geometric Puzzle Design by Stewart T. Coffin |  Puzzles and Paradoxes by T. H. O'Beirne |  The Universe in a Handkerchief by Martin Gardner |  The Moscow Puzzles by Boris A. Kordemsky |  The Colossal Book of Short Puzzles and Problems by Martin Gardner |  Fractals, Googols, and Other Mathematical Tales by Theoni Pappas |