Larry McMurtry

Much-lauded Brokeback Mountain was filmed from a screenplay written by Larry McMurtry and Diana Ossana. McMurtry is one of America's best known authors. His novels are the basis of some excellent films. McMurtry's writing credits:
Horseman Pass By - novel on which Hud was based
The Last Picture Show - novel and screenplay
Terms of Endearment - novel with screenplay by James L. Brooks
Lonesome Dove - novel with screenplay by Bill Wittliff