This book is recommended to those interested in all the subjects that are presented here and on many other boards. Written in the 1920s, the author writes about many of the secret groups and mystery sects that are the subject of so many sites. A great reference book to be had, and one can see that some of the ideas expressed as new are in fact quite old.
The subjects range from Atlantis to ancient mysteries. This book is like a written version of "In Search Of...".