CUSTER AND THE BATTLE OF LITTLE BIGHORN:  An Encyclopedia of the People, Places, Events, Indian Culture and Customs, Information Sources, Art and Films (2001)

CLASHES OF CAVALRY (2001)

THE CUSTER COMPANION: A Comprehensive Guide to the Life of George Armstrong Custer and the Plains Indian Wars (2002)

THE BLUE, THE GRAY AND THE RED (2003)

BLACK KETTLE: The Cheyenne Chief Who Sought Peace but Found War (2004)

ENCYCLOPEDIA OF THE ALAMO AND  THE TEXAS REVOLUTION (2007)

OSCEOLA AND THE GREAT SEMINOLE WAR: A Struggle for Justice and Freedom (2012)

THE LAST OUTLAWS:  The Lives and Legends of Butch Cassidy and the Sundance Kid (2014)

THE LAST DAYS OF GEORGE ARMSTRONG CUSTER: The True Story of the Battle of the Little Bighorn (2015)