Robert Summers has written books about Dr. Samuel A. Mudd, a physician who provided medical assistance to John Wilkes Booth following the Lincoln assassination, and also a book about the men of Maryland's 19th Regiment, U.S. Colored Troops during the Civil War.

The U.S. Colored Troops book was a ten year project, requiring the personal review of the soldiers' military and pension files at the U.S. National Archives in Washington, D.C. The regiment was organized and trained at Camp Stanton, only ten miles from Dr. Mudd's farm. Most of the soldiers were former slaves from farms in southern Maryland and the eastern shore of Maryland. Some had been slaves on Mudd family farms.