The wicked waterpark of Wyoming

Summary: "In Casper, Wyoming, a new waterpark is ready to open. Hundreds of people from all over will be attending the grand opening. Including Madison Armstrong and her friend, Griffin Claremont. But WonderSplash holds a sinister secret that no one is supposed to know about. When Madison and Griffin have the opportunity to take a guided tour of the waterpark the day before it opens, they jump at the chance. But instead of getting a behind-the-scenes look a WonderSplash, they are soon lost in a hidden world beneath the facility...a world with strange creatures no one has ever seen. Frightened and confused, Madison and Griffin are forced to fight for their lives. But even if they survive the vicious attacks from unearthly creatures, will they make it out alive? Or will they remain lost in a strange world beneath the mysterious waterpark known as WonderSplash?"-- Page [4] of cover.