By the end of the 13th century, two very powerful and rich destinies of the Grand Duchy of Vladimir were formed in the north-east of Russia - the Tver and Moscow principalities, which made up a competitive pair for dominance in the lands of the Vladimir Grand Duchy and the role of a collector of Russian lands. And this confrontation dragged on for several decades. Only in 1384, Khan Tokhtamysh recognized the Moscow prince Dmitry Ivanovich (Donskoy) as hereditary possession of the Grand Duchy of Vladimir and Moscow. The new book by Alexander Shlyakhtorov is a detailed story about the confrontation between Moscow and Tver, giving an answer to the most important question - why it was Moscow that rose and became the collector of Russian lands.