On the afternoon of October 26, 1881, in a vacant lot in Tombstone, Arizona, a confrontation between eight armed men erupted in a deadly shootout. The Gunfight at the O.K. Corral would shape how future generations came to view the Old West. Wyatt Earp, Doc Holliday, and the Clantons became the stuff of legends, symbolic of a frontier populated by good guys in white hats and villains in black ones. It’s a colorful story—but the truth is even better.

Drawing on new material from private collections—including diaries, letters, and Wyatt Earp’s own hand-drawn sketch of the shootout’s conclusion—as well as archival research, Jeff Guinn gives us a startlingly different and far more fascinating picture of what actually happened that day in Tombstone and why.