Leroy Thompson trained and advised military and police special operations units around the world, focusing especially on the tactical use of firearms. He has previously had 40 books published and more recent titles include The Hostage Rescue Manual, The Counterinsurgency Manual and Secret Techniques of the Elite Forces. He has also had various firearms books published including Great Combat Handguns, and appeared as a weapons expert on documentaries for Discovery, National Geographic and the BBC.
Johnny Shumate works as a freelance illustrator living in Nashville, Tennessee. He began his career in 1987 after graduating from Austin Peay State University. Most of his work is rendered in Adobe Photoshop using a Cintiq monitor. His greatest influences are Angus McBride, Don Troiani, and Édouard Detaille.