"The Beginning of the Petrovsky Era" is a book written by the famous Ukrainian historian Mykhailo Hrushevskyi. In this work, the author examines a difficult period in the history of Ukraine, connected with the name of Hetman Ivan Mazepa and his participation in the Northern War against the Russian Empire. The book describes in detail the complex political and social processes of the late 17th and early 18th centuries and sheds light on the events that preceded important events in the history of our nation. "The Beginning of the Petrovsky Era" is not only a historical narrative, but also an invitation to delve deeper into the complex interrelationships of the past and their influence on the present.