The Silent Place — Rachel Cosgrove Payes

Suzanne Barclay had drowned six years ago, but her body had never been recovered. In another year, Rome Barclay would be officially a widower - free to remarry. Paulette, his secretary, and Fiona, his daughter's governess, counted the days.

Then the clock stopped: Suzanne returned to Cliffhouse, a victim of amnesia, her identity a mystery to her.

But there was someone on the isolated coastal estate who wished the sea had claimed her permanently, someone who was desperate enough to turn the Silent Place into a screaming death trap...

Takes place in New York