The Hunters - Pulp World, #3

With friends like these... Caroline Tate seems to have it all: she's beautiful, married to a wealthy and handsome man, and newly relocated from Boston to an exotic island off the coast of Thailand. But beneath the veneer of perfection lurk secrets of betrayal and tragedy that make her volatile and vulnerable. When Caroline is befriended by a seductive American widow and a charmingly mysterious Englishman she is drawn into a sinister spiral of manipulation and murder that leaves her fighting for her sanity and her life.
The Hunters is a gripping novel of psychological suspense that hurtles to a diabolically Hitchcockian climax.