Matthew Algeo: Abe & Fido: Lincoln’s Love of Animals and the Touching Story of His Favorite Canine Companion. Chicago Review Press, Chicago, IL 2015, ISBN 978-1-55652-222-2.
Chapter 4: Assasinated Like His Master. In: Brooke Janis, Roy Rowan: First Dogs: American Presidents and Their Best Friends, 2. Auflage, Algonquin Books, Chapel Hille, NC 2009, ISBN 978-1-56512-936-8, S. 37–50.