"Fiction. Alternative history" - a series of books in the genre of alternative history, where the Popatans create a new past.... Due to the fact that the body of Boris Godunov's son, Tsarevich Fedor, was brought into the consciousness of a successful Russian businessman, the history of Medieval Russia, and the whole world, went according to a completely different scenario. Young Tsar Fedor did not die in infancy, but grew up and matured. He managed to avoid the Troubles, get rid of the threat of raids by Tatars-Krymchaks, and most importantly - to introduce the technologies of the future in the state under his control...