Most of what Larry McMurtry wrote is worth reading.
He also didn't give a chit about history, or using historic figures to entwine HIS perception of what they were...
I believe that's true since Lonesome Dove was based on the Loving-Goodnight cattle venture which led to Loving's death. Loving and Goodnight weren't going to Montana, and the attack which led to Loving's demise took place on the Pecos River rather than in Montana but the parallels are not coincidental. McMurtry made one hell of a great story out of a real event.
The prequel, I believe, was Comanche Moon. I think that one is purely fictitious, but some of the places described can be recognized. One such place is present day Monahans. That was a great read as well.
