Lies Beneath by Anne Greenwood Brown
Vampires? Been there. Werewolves? Done that. Mermaids? Welcome to Lies Beneath. Calder White is a merman. He lives in Lake Superior with his sisters during the summer, but during the winter he tries to get as far away from them as he can. When his oldest sister lets him know that John Hancock has been found though, Calder is ready to return to the lake in order to help his sisters get their revenge. When Hancock finally arrives with his family in tow, Calder is chosen to be bait for Hancock's daughters. The plan is for Calder to bring the youngest girl, Sophie, into the woods and lead her to his sisters. Then one of his sisters would take her further into the woods and put her to sleep. Calder would then bring Sophie home once everyone was sufficiently worried, therefore making Calder a person Hancock can trust. Unfortunately for Calder, his eldest sister causes the plan to go awry and Lily Hancock becomes the new target for Calder. But as Lily slowly starts to t