HT
Hans Louis Trefousse
Hans Louis Trefousse was a German-American author and historian of the Reconstruction Era and World War II. He was a long-time professor at Brooklyn College from 1950 to 1998. He also taught as a distinguished professor of history at Graduate Center of the City University of New York.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Andrew Johnson A Biography
1997
ISBN 9780945707226
Thaddeus Stevens Nineteenth-Century Egalitarian
2001
ISBN 9780811729451