The Castaway's Bride — Susan Page Davis

Edward Hunter has been shipwrecked and marooned on a desert island for four years. He finally returns home and finds changes everywhere. His native Maine is now a state. His beloved father is dead, and Edward now owns the shipping company. And his fiancee, Abigail, Bowman, believing him dead, has promised to marry his cousin. Abigails younger sister, Deborah, acts as a mediator between Edward and Abigail, but he soon begins to wonder if attempting to win Abigail back is a mistake. Perhaps God has another plan for him and the loyal, understanding Deborah.