2013 - Puzzles By Penrose the Mathematical Cat (Paperback) ISBN-13: 9781884550706 ISBN-10: 1884550703 Genres: Children's Books, Humor & Entertainment ? 1993 - Fractals Googols and Other Mathematical Tales (Paperback) ISBN-13: 9780933174894 ISBN-10: 0933174896 Genre: Science & Math 4 1993 - The Joy of Mathematics (Paperback) → Hardcover ISBN-13: 9780933174658 ISBN-10: 0933174659 Genre: Science & Math 3 |