Grace Livingston Hill 
Daphne Deane 

Lovely Daphne Deane is a small-town girl who has been trained for a life of faith and simple devotion. Then she falls helplessly in love with architect Keith Morrell, who is investigating a series of mysterious happenings at his deserted family home—and who is engaged to another woman! Suddenly Daphne finds herself drawn into a world of money and social intrigue as her faith is tested to its limits.