Ronald Grigor Suny is the William H. Sewell Jr. Distinguished University Professor of History at the University of Michigan and professor emeritus of political science and history at the University of Chicago.
Awesome collection of primary sources from the Soviet era. Accompany it with a great history book on the Soviet Union, and you could practically teach a class on it yourself. It's really interesting to read Lenin and Stalin's official documents and see how they helped shape the course of 20th century history.