Guardians of the 39 Clues, Dan Cahill and his sister Amy discover that the serum is missing and must race against time to get it back before catastrophe strikes.

A boy who may be part changeling, twins involved in a bizarre secret experiment, and a clurichaun in a red tracksuit try to save the world from an evil cereal company whose ultimate goal is world domination.

Having discovered the truth about the town of Wormwood before surviving the dangerous wilderness of the Quag, heroine Vega Jane, who has endured more than anyone before her, is confronted by devastating forces unlike any she has ever encountered.

Eight-year-old Jack, his seven-year-old sister, Annie, and Peanut the mouse ride in a tree house to the Amazon rain forests, where they encounter giant ants, flesh-eating piranhas, hungry crocodiles, and wild jaguars.

Star has moved his herd of refugee pegasi to the coast to escape the Mountain Herd and the bitter memories of the past, and as head stallion it is up to him to protect and lead them--but the freezing storms of winter are coming, old enemies are seeking revenge, and an ancient adversary has awoken from sleep.

When his deadbeat superhero father reappears to ask Lucas to take his place and become the new Raptor upon his death, Lucas finds himself in a precarious position when he sees what a bad superhero his father has been.

Teenage criminal mastermind Artemis Fowl must save the underwater fairy metropolis of Atlantis from danger, while battling a psychological affliction known as the Atlantis Complex.

After the mutant Erasers abduct the youngest member of their group, the "bird kids, " who are the result of genetic experimentation, take off in pursuit and find themselves struggling to understand their own origins and purpose.

An adventure on the open sea challenges Ruby to crack the case of a nefarious pirate band while evading the clutches of a vile sea monster and the evil Count von Viscount.

"A thrill-seeking twelve-year-old with a mysterious family heritage discovers ancient objects of rare power--and must protect them from the terrifying demons who will do anything to posses them"--provide by publisher.