Zane Grey 
The Call of the Canyon [EPUB ebook] 

From the master of the western novel comes a tale full of romance and adventure. This is the story of Carley Burch, a young wealthy socialite living in New York City. As the story begins soldiers are coming home from the trenches of WWI, many of them damaged physically and emotionally. Among them is Carley’s fiancé, Glenn Kilbourne. He goes West to find his health and himself, with the idea that he’ll return when all is well. They correspond until she eventually heads West to find and woo him, in the process realizing that she too has changed. How can she reconcile the love for this man and her love for this place he has gone so far away from? Their fate together remains in doubt until the end.