1994 - Flatland / Sphereland (Paperback) ISBN-13: 9780062732767 ISBN-10: 0062732765 Genres: Literature & Fiction, Science Fiction & Fantasy, Science & Math, Engineering & Transportation 12 1981 - Science Fiction Puzzle Tales (Hardcover) → Paperback, Hardcover ISBN-13: 9780517543818 ISBN-10: 0517543818 Genres: Science Fiction & Fantasy, Humor & Entertainment 1 |