Yep I got that book also . One I have had for years and like is "Encyclopedia of Western Gunfighters" by Bill O'Neil . It list each gunfighters/outlaws shootout and killing as best to be estimated that is . One gun/history nerd to another did you know Lewis and Clark had air rifles on their expedition ? They used them to impress the indians they met . Can't remember the name it was called but it's true .