...Many topics were connected with this story of the death of a group of tourists, including the secrets of rocket flight, radiation from nuclear weapons tests, mysteries of injuries, mysteries of natural disasters, and mysteries of human behavior. But in order to understand what happened on the fateful night from February 1 to 2, 1959, it was necessary to put all the facts and events in their place - when, where and under what circumstances they occurred. Then the role of the main factors of events both in the accident itself and in the many rumors and legends that arose around it became clear... This edition of the book, even more complete and accurate, was obtained on the basis of new facts of the investigation, and as a result of constant editing of the text of the book over the past years. The enormous “inertia” of the investigation into the Dyatlov Group Tragedy made it possible not only to obtain new evidence and clarification of its events and facts, but also to reach a higher level of understanding of the underlying causes of the increase in accidents in tourism and mountaineering at the peaks of solar activity. And explore the connections of this factor with various other natural phenomena. This edition of the book was published on the Internet and with its English translation - now foreign readers can familiarize themselves with the book.