The first part of this text begins with a brief review of historical, religious and occult ideas of the life of the soul after death. The next part of the book offers an opportunity to evaluate both the course of the study and the chain of reasoning, and if necessary, to reproduce it. It also includes generalized information on physical/chemical changes ocurring in the body during several days after death. The third part of the book, written together with Dr A. Kouznetsov, presents ideas on connections between eastern philosophical ideas and western scientific approach.