Existence outside the physical body and life after death do not need proof for many readers. The author, who experienced a near-death experience as a child, under the influence of Robert Monroe's books, began independent research in this area. Now his cases of leaving the physical body number in the hundreds! That is why his book can tell us more about consciousness and the soul than a study of hundreds of descriptions of individual, unrelated cases of OBEs. Peterson gives in his book numerous exercises with which you can try to achieve an OBE. If you seriously try to do the exercises and you succeed, then the word “soul” will cease to be just a concept or an assumption: its reality and impact on our lives will become experimental verified information.