Dover Publications, edition 1917. - 428 pages.
The essays that appear in this book originally appeared in The Monist between 1905 and 1916.They were written by W.S. Andrews. Other contributors include Harry A. Sayles, Dr. C. Planck, H.M. Kingsley, D.F. Savage, C.A. Browne, L.S. Frierson, and Paul Carus, and they cover topics such as magic squares, magic cubes, the Franklin squares, magics and Pythagorean numbers, the theory of reversions, magic circles, spheres, and stars, and magic octahedroids, among other things.