Just finished the May 2011 published book "THE LAST GUNFIGHT: The Real Story of the Shootout at the O.K. Corral - And How It Changed the American West" by Jeff Guinn. If you were to read only one book on the subject, I'd choose this one. It's based on the most recent research and is not just about Wyatt Earp. It's about the West, Arizona, Tombstone, the Cowboy faction, the Earp faction, the shootout and its aftermath. Easy to read and demythologizes the legend of Earp, Holliday, and the shootout.
Another is 1989's "AND DIE IN THE WEST: The Story of the O.K. Corral Gunfight" by Paula Mitchell Marks. From what I understand, it's been considered the standard for years.
If you read either of these books, you'll get a much more mature and realistic view of what happened. Hollywood is certainly not the place you'll get that. Nor, will you get it from Stuart Lake.