The following bit on Tom Horn's book is from Guide to Life and Literature of the Southwest By J. Frank Dobie
"HORN, TOM
"Life of Tom Horn . . . Written by Himself, together with His Letters and Statements by His Friends, A Vindication. Published (for John C. Coble) by the Louthan Book Company, Denver, 1904. Who wrote the book has been somewhat in debate. John C. Coble's name is signed to the preface attributing full authorship to Horn. Of Pennsylvania background, wealthy and educated, he had employed Horn as a stock detective on his Wyoming ranch. He had the means and ability to see the book through the press. A letter from his wife to me, from Cheyenne, June 21,1926, says that Horn wrote the book. Charles H. Coe, who succeeded Horn as stock detective in Wyoming, says in Juggling a Rope (Pendleton, Oregon, 1927, P. 108), that Horn wrote it. I have a copy, bought from Fred Rosenstock of the Bargain Book Store in Denver, who got it from Hattie Horner Louthan, of Denver also. For years she taught English in the University of Denver, College of Commerce, and is the author of more than one textbook. The Louthan Book Company of Denver was owned by her family. This copy of Tom Horn contains her bookplate. On top of the first page of the preface is written in pencil: "I wrote this -- `Ghost wrote.' H. H. L." Then, penciled at the top of the first page of "Closing Word," is "I wrote this."
"Glendolene Myrtle Kimmell was a schoolteacher in the country where Tom Horn operated. As her picture shows, she was lush and beautiful. Pages 287-309 print "Miss Kimmell's Statement." She did her best to keep Tom Horn from hanging. She frankly admired him and, it seems to me, loved him. Jay Monaghan, The Legend of Tom Horn, Last of the Bad Men, Indianapolis and New York, 1946, says (p. 267), without discussion or proof, that after Horn was hanged and buried Miss Kimmell was "writing a long manuscript about a Sir Galahad horseman who was `crushed between the grinding stones of two civilizations,' but she never found a publisher who thought her book would sell. It was entitled The True Life of Tom Horn."
"The main debate has been over Horn himself. The books about him are not highly important, but they contribute to a spectacular and highly controversial phase of range history, the so-called Johnson County War of Wyoming. Mercer's Banditti of the Plains, Mokler's History of Natrona County, Wyoming, Canton's Frontier Trails, and David's Malcolm Campbell, Sheriff (all listed in this chapter) are primary sources on the subject."