Gunfight at the O.K. Corral — Gayle Martin

Luke and his sister Jenny aren't overly excited when they first learn of their mother's plan to take them to Tombstone, Arizona, as part of their vacation.  That changes in a hurry when they are suddenly swept back to the 1880s and the famous gunfight at the O.K. Corral.  The ghost of the Grand Hotel's handyman, a kindly gentleman by the name of Swamper, guides them through the events of that fateful time.  Young readers are right there with Luke and Jenny as they learn firsthand the story of the Earp brothers and what led to the historic shootout.