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 goof...

A teenaged girl and her boyfriend must find her older brother after he wanders into their town's swamp and a mysterious girl appears in his place.

Fourteen-year-old Enola Holmes, disguised as a beautiful woman, finds clues in floral bouquets as she searches for the missing Dr. Watson, a companion of her famous older brother, Sherlock.

Being 12 in Redrock means you're watched all the time: because 12-year-olds in Redrock go missing and are never found. When Scott's sister gets sick and he's confronted by the Prankster to play a deadly game for her survival, he finds out winning might not be better than losing.

"As the engine is transported across country by train, Nancy must protect it from sinister forces that will stop at noting to destroy it--and everyone on board!"-- P. [4] of cover.