Mineola, NY: Dover Publications, (1992) dj. Hardcover - An unabridged hardcover edition of this classic work which is a fictional introduction to the concept of spaces - flat, lines, three-dimensional. Includes the original illustrations by the author and a reproduction of the original title page, the 1884 Preface to the Second Edition, and an 1952 Introduction by Banesh Hoffmann. xii, 83 pp. ISBN: 0-486463354.