As someone who has direct experience with the out of body phenomenon, this book was invaluable. It is not the best book on this topic but those of us who have these experiences often fear for our sanity. This book lets us know that we are not alone. Unlike many books dealing with this subject, the author is not someone who has a spiritual message to shove down our throats. He gives an honest account of his experiences and all of the accompanying fears and troubles and joys. He is highly credible and one can identify with his very human and normal reactions to a baffling phenomenon. It is important to take into account when reading this book that Monroe wrote it at a time before people had wide spread knowledge of thw out-of-body experience. It took great courage for him to share his experiences with the world. It is also commendable that he sought to try and find a scientific basis for the phenomenon and founded the Monroe institute towards this end.
My only criticism is that his terminology is at times a bit cumbersome, but I think overall this book is worth the read. I think his next book, Far Journeys is actually better.
Finally, after delving into this subject for many years, I think it is important to understand that the out-of -body experience serves as a gateway to perceptual abilities that we consider to be paranormal. These abilities include but are not limited to clairvoyance, telepathy and telekinesis. As such, learning to have this type of experience is part of the Toltec sorcery teachings. For more information about this approach to the out-of-body experience read 1)The Art of Dreaming (Carlos Castaneda), 2)The Path: A Practical Approach to Sorcery (Esmeralda Arana)