Hearts by the Tower — Olga Sinclair

Beth Rushbrook finds the old Black Tower by the sea strangely fascinating. When the owner of Black Tower Farm, Duff MacBrae, asks her to help discover what is disturbing his daughter, Effie, she is intrigued by his approach. The mysterious death of Duff's wife at the tower, the previous summer, may be significant... But, dealing with a superstitious housekeeper, the lovely Fiona Robertson and Duff's strange attitude, life gets complicated for Beth - especially when she finds herself becoming emotionally involved.