The novel is a detailed biography of the well-known Kyiv prince Sviatoslav Igorevich, a broad panorama of events in Kievan Rus’ in the 10th century on the eve of its Christianization by Vladimir, as well as relationships with Byzantium, Khazaria, Bulgaria, and other countries and peoples of the early Middle Ages. It is based on many historical facts reinterpreted and recreated by the authors with such care and depth that there are every grounds to call this work a reconstruction novel. The reign of Princess Olga, the details of Sviatoslav’s Vedic education, his love and military coming-of-age, romantic episodes and thrilling battle scenes will delight readers. Take a unique magical journey into the depths of the Russian people’s genetic memory! The series offers three books covering the events of 953–971: Sviatoslav’s youth and coming of age; the defeat of the Khazar Khaganate; the war in Bulgaria. So, the third book: Sviatoslav. Bulgaria.