Ever since her father was lost at sea, Sophia has been moping around Aqualand, a marine theme park. But Sophia's world is turned upside-down when an "aquanaut" breaks into the park's research lab. To her amazement, Sophia discovers that the aquanaut is not what it seems: inside lives a band of goofy sea creatures! And when they all realize that Aqualand is more sinister than advertised, Sophia is determined to help the aquanaut crew free the park's...

Twins Theo and Alexander along with their sister Wil are abruptly dropped off at their Aunt Saffronia's house, where they learn they must complete a series of tasks in order to see their parents again, the first of which is solving a mystery at the Fathoms of Fun waterpark.

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Billy and Sheena always expect adventure when they join their uncle, Dr. Deep, aboard his hi-tech boat. What they don't expect is a treasure hunt leading to a 200-year-old sea captain... who refuses to stay dead!Just when they think the tide is turning, Billy and Sheena accidentally drive into a dangerous mystery. A chilling surprise awaits them in Horrorland, the theme park where their worst nightmare is about...

Fourteen contestants, including Mack, a homeless shelter resident who lost everything, embark on a seven-day competition and the chance to win $50,000 if they can successfully play hide-and-seek in an abandoned amusement park without being found and eliminated.

What should Carly Beth be for Halloween this year? Terrified! Late at night, and an ugly green mask is mysteriously calling out to her. If Carly Beth survives the night, even a scary theme park might sound like a vacation. Or maybe not! At Horrorland, every night is Halloween. And those monster masks? They aren't masks at all.

Simple text and illustrations tell the stories of four haunted amusement parks found throughout the world.

Abby and Peter pay a visit to their Uncle Jonathan who seems very knowledgeable about Egyptian mummies, but they become suspicious at the strange sounds coming from a room inside his house, and their fears continue as they are invited to Horrorland.

Heidi and her best friends take a road trip with her best friend Lucy Lancaster to the Wacky Wonders Adventure Park where there are water slides, wild rides, and plenty of friendship drama between Heidi and Lucy.

An American bioengineering research firm erects a theme park on a Caribbean island, complete with living dinosaurs, and invites a group of scientists to be its first terrified guests.