Jack's summer job is to hang out with two eerily well-behaved children on an isolated island--no TV, phones, internet, cell service, nothing. Despite his early misgivings about the job (including the seagull screaming at him to turn back on the ferry over), he enjoys it--but there's still something weird. Then he starts seeing the man. And then the red-haired woman from the ferry. And then learns that they're both dead, and the mysteries keep on coming. 
 A retelling of The Turn of the Screw (which I haven't read), this has all the flavor of a gothic horror/ghost story, a good choice for the Halloween season. Easy read-alikes are the source material, Shirley Jackson, Long Lankin, and The Shining, as we see Jack uncover more and more of the island's history and his slow personality shift. Would recommend to 8th grade and up looking for something creepy for the gloomy fall nights.