Book "1917-1920. The Fiery Years of the Russian North" is devoted to the history of the revolution and the Civil War in the Russian North, studied by Soviet and most modern Russian historians somewhat one-sidedly. The author sets out a chronicle of events, hostilities, studies the role of British, American and French troops, the behavior of different segments of the population: workers, peasants, the bourgeoisie and intelligentsia during the Civil War in the North; as well as the entire complex of Russian-Finnish contradictions, which were of great importance in the Civil War in the North of Russia. The book uses numerous archival sources, including never before studied materials from the archive of the French Ministry of Foreign Affairs. The author offers answers to the question why the democratic governments of the Northern region could not carry out the third path in the Civil War. This work is a continuation of the book "The Third Way in the Civil War. Democratic Revolution of 1918 on the Volga" (St. Petersburg, 2015).