The name of the former GRU intelligence officer Vladimir Rezun, acting under the odious pseudonym Viktor Suvorov, became notorious after the publication of the book "Aquarium." What prompted our intelligence officer to betray the Motherland? What secrets did he hide not only from fellow students at the Suvorov School, but also from his family?.. Author of the book, professional intelligence officer Alexander Kadetov, relying on rich personal experience, as well as on materials received from former GRU employees, SVR, FSB and graduates of Suvorov schools, puts forward its version of the reasons for treason to the Motherland V. Rezun. This edition of the book is significantly supplemented by the author with new, previously unknown materials about the life of a famous traitor, which will arouse interest not only among intelligence officers, but also among a wide range of readers.