Goosebumps Horrorland #02: Creep From The Deep

Billy and his sister, Sheena, unwittingly dive into a terrifying mystery when they accept a surprise invitation to HorrorLand, the amusement park that always lives up to its name. But first Billy and Sheena must sink or swim aboard a doomed ship that happens to be underwater, with a captain who happens to be dead. At least he used to be!