The author focuses on the story of the origin and ethnic history of Ossetians who preserved the language and cultural elements of their ancestors - Scythian-Sarmatians, Alans and ancient Caucasians. The author seeks to summarize all the data available to this day on the ethnogenetic and ethnocultural ties of Ossetians not only with their predecessors, but also with residents of other regions of Eurasia, as well as with their closest modern neighbors. The monograph is a kind of result of many years of research by a scientist on the problems of the Nart epic and a number of important episodes from the history of Ossetians. The book also includes several essays on world-wide researchers who contributed to Ossetian studies - A.M. Shegren, V.F. Miller and V.I. Abaev.