This book is a systematic overview of the variety of forms of hypnosis found in everyday human life. At the same time, hypnosis does not seem to be some kind of private phenomenon that exists along with many other mental states, but one of the main mental system-forming factors not only in the life of an individual, but also of society as a whole. In a popular form, they are generalized, brought to logical formulations and supplemented by their own the author's concepts of the nature and properties of hypnosis and suggestion, which were expressed at different times by individual researchers. This information can greatly facilitate the understanding of the characteristics of human mental activity and thereby serve as a justification for appropriate psychohygienic actions.