""Russia Under Two Tsars 1682-1689: The Regency of Sophia Alekseevna"" is a historical book written by C. Bickford O'Brien. The book explores the period of Russian history from 1682 to 1689, during which time two tsars, Ivan V and Peter I, ruled under the regency of their sister, Sophia Alekseevna. The book details the political and social climate of the time, including the power struggles between the ruling class and the challenges faced by the young...