Anybody Ever Read "The Mastery of Life"?

Its that free book you get if you answer the Rosicrucians ad in magazines.
When I was a kid, magazines like “Mechanix Illustrated” had those ads for the Risocrucians. if you sent a self-addressed envelope, they would send you a book called “The Mastery of Life”.
Seemed like a good deal to me-anyway-if you contatced these people, would they wind up hounding you (like the $cientologists)-was AMORC a cult of some kind?