Where the Heart Is by Patricia Kay

After ten years in Alaska, Keith, the prodigal son of the Callahan clan, returns to Rainbow’s End, Texas, to face his past, including Susan Sheridan, the woman he still loves and the son he doesn’t know is his. Thus begins the continuing saga of the Callahans and their friends. With some of her favorite themes of family relationships, life in small towns, and second chances, Patricia Kay is in her element in this first book of the Rainbow’s End series set in the Texas Hill Country.