Born in Baltimore, Gene Thorp is a senior cartographer at the U.S. Department of State, Office of the Geographer. He spent 15 years as an award-winning graphics editor at The Washington Post covering daily stories from the 2000 Bush-Gore election to the rise and fall of the Islamic State. His custom maps can be found in numerous non-fiction books on the New York Times Best-Seller list and throughout museums and parks across America.

Award-winning author and historian Alexander B. Rossino resides near Boonsboro, Maryland. He worked at the U.S. Holocaust Memorial Museum (1994-2003) and is the author of Hitler Strikes Poland: Blitzkrieg, Ideology, and Atrocity, an acclaimed history of the policies implemented by the Third Reich during its 1939 invasion of the Polish Republic, and more than a dozen scholarly articles and book reviews.

Dr. Rossino is also the author of the deeply researched and beautifully written Six Days in September, a novel about Lee's Army in Maryland during the 1862 campaign, as well as Their Maryland: The Army of Northern Virginia from the Potomac Crossing to Sharpsburg in September 1862 (2021), a historical study of the same period. He is currently anticipating the release of The Guns of September: A Novel of McClellan's Army in Maryland, 1862, a companion to Six Days in September.