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- ISBN: 9780439918701 | 0439918707
- Cover: Paperback
- Copyright: 4/1/2008
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!