About the book: 2019 / S.N. Sogrin is one of the few who still witnessed the tragedy 60 years ago that occurred on February 1-2, 1959 in the Northern Urals with a group of tourists from the Ural Polytechnic Institute under the leadership of Igor Dyatlov. Few people today have not heard about this mysterious story from newspapers and magazines. This topic is especially widely discussed on television. It has acquired a mysterious, mystical character, where it is already difficult to separate speculation and false testimony from the true causes of the deaths of tourists. The testimony of Sergei Nikolaevich, as a participant and one of the leaders of the search work, is of fundamental importance for understanding the true cause of the tragedy and its consequences. The author not only describes in detail the events of bygone days that he witnessed, but also provides an analysis of them. The main value of this work is that his observations “hot on the heels” make it possible to reasonably reject many “sofa” versions, born of the imagination of people who had little knowledge not only about sports tourism of those years, but also about the general situation in society. The book is intended for a wide range of readers.