Most readers are probably familiar with the John Wayne movie by this name, in which two men spend years of hardship tracking a little girl kidnapped by Indians. The movie did follow the book in most ways & I very much enjoyed reading it.
One of the best westerns I've ever read, it was so good it was made into a John Wayne movie with the same title. The book is about two main characters, Mart and Amos, journey to find a girl, Debbie, stolen from their family by the Comanches in Texas. It has love, involves the Texas Rangers, Cavalry, and the lure of finding a this girl.