Undoubtedly and without even having read others, I would say this is the best book can teach us what an astral projection and how it's done. The author first proposes his personal evolution in the first 100 pages. Then it exposes us various theories about the universe; and finally, he proposes various simple techniques, in turn, live output experiences outside the body. If you want to inform you, if you are afraid or want to learn how to do astral projections, it is THE book to own.