WB, here you go. Johnny Ringo's SAA

I Married Wyatt Earp by Josephine Earp. The footnotes and commentary by the Arizona State University are worth the price of the book

A copy of The Tombstone Epitaph that details what Wyatt Earp called "The Street Fight" and what has become known as the "OK Corral Gunfight" ...

And if you can find them, there is a collection of papers with copies of the originals in Wyatt's own handwriting in which he details the killing of Johnny Ringo .. the "Street Fight" .. the killing of Curly Bill .. and one other .. the guy they shot at the Tucson Train Station in retaliation for killing Morgan Earp. These papers were written in the 1920's a few years before he died.

https://uapress.arizona.edu/book/john-ringo

There are other biographies by Kevin Hogge and David Johnson that I haven't yet read, so can't vouch for 'em.