Book by A.L. Dvorkin’s “Sect Studies” immediately acquired the status of a basic textbook at the Faculty of Theology at the Ural State Vocational Pedagogical University, which was opened by the Ekaterinburg diocese. The undoubted advantages of the collected and systematized material about the teachings, methods, history and specific harm of totalitarian sects make this study a reference book for a missionary in any a parish that lives surrounded by the aggressive expansion of destructive cults and where ordinary people turn, seeking protection and truthful information about cults.