The book "Russian Orthodoxy between Kyiv and Moscow" by V.M. Lurie presents the main trends in the development of two Russian Orthodox traditions, western and eastern, from the beginning of the 15th to the middle of the 20th century. Particular attention is paid to the development of church-political ideology and canonical consciousness, as well as to the historical circumstances themselves, in which both had the opportunity to manifest themselves. The author draws conclusions about the fundamental bipolarity, but at the same time the indissolubility of the single Russian Orthodox tradition.