About the book: 1989 / About the path that Rus' took during the 13th–15th centuries, from political fragmentation on the eve of the Tatar-Mongol invasion to victory in the Battle of Kulikovo and the creation of a centralized Russian state, say Doctor of Historical Sciences I. B. Grekov and writer F. F. Shakhmagonov. Viktor Ivanovich Buganov is a famous Soviet scientist, Doctor of Historical Sciences, head of the department of source studies at the Institute of History of the USSR of the USSR Academy of Sciences. He is the author of more than 300 scientific works, including five monographs, and popular science books. In the series “The Life of Remarkable People” he published the books “Pugachev” and “Bulavin”. The first book published in the “World of History” series, “The Initial Centuries of Russian History,” was written by academician B. A. Rybakov, the second, “Russian Lands in the XIII-XV Centuries,” was written by Doctor of Historical Sciences I. B. Grekov and writer F. F. Shakhmagonov.