The Keeper by L. Kay Bryden details from sapnaonline

When newlyweds, Dr. Mirrah Dobrey-Brenton and her husband, Landy, move to Black Rock Island, Mirrah believes it's the beginning of a fairy tale. By her husband's side, they embark on a new beginning, when Mirrah accepts her retired father's position as Black Rock's only Doctor, and Landy, "keeper" of Mirrah's beloved, ancestral, lighthouse home. Together they happily await the impending arrival of their first born children . . . much-awaited triplets. For the happy couple, life is perfect. However, what began as a fairy tale, abruptly becomes Mirrah's worst nightmare, when she's violently awakened one dark, stormy, October evening, to discover her husband's lifeless body hanging by the neck. Five years later . . . still destined for misfortune, and haunted by ghosts of the past, Mirrah, her three children, and Sheriff Frank Brogan, find themselves in a fight for their lives with a very real and very deadly enemy. A sadistic mad man who's been much closer than either of them could have ever imagined.