The Man of the Desert - Grace Livingston Hill

Fleeing from an aggressive suitor, Hazel Radcliffe becomes hopelessly lost in the Arizona desert. Exhausted, she falls unconscious from her pony. Soon she is found by John Brownleigh, a handsome missionary who lives nearby. As he cares for her, a strong and true love grows between them. She was raised in luxury, he was raised to serve God. They part knowing very little about each other except for the love they feel. Back home among her family and friends, Hazel makes an important decision. She will do all she can to change, but can she do so before it's too late? Follow her journey of coming closer to the Lord and finding true love in an unlikely place. - Summary by LikeManyWaters