The events covered in the book belong to history. However, the book is not strictly historical in genre. Despite the fact that the reliability of the above is documented, we are still not facing a chronicle book. Not the course of events as such attracted the attention of the authors. They talk about how the atomic bomb was created in three countries - in fascist Germany, in the USA and in the Soviet Union, about the people who took students in this, and above all about atomic scientists.