I first read Horan's 1958 book The Wild Bunch, which is now kind of difficult to find. This book includes some interesting facts which have been unearthed since the time of the first book. The photographs that are reproduced here really add to the book as well - the photos reproduced in the old paperback I had were grainy, but these are great. The book gives a good description of the facts, and I was surprised at how fast I finished it. Definitely of interest to those who love the stories of the Old West.