Fifteen-year-old Tory and her "viral" friends, who contracted heightened, wolflike senses during an experiment gone wrong, investigate an abduction case and make some troubling new discoveries about their powers.

Fifteen-year-old Daniel has followed in his parents' footsteps as the Alien Hunter, exterminating beings on The List of Alien Outlaws on Terra Firma, but when he faces his first of the top ten outlaws, the very existence Earth and another planet are at stake.

From his 1776 Pennsylvania homestead, thirteen-year-old Samuel, who is a highly-skilled woodsman, sets out toward New York City to rescue his parents from the band of British soldiers and Indians who kidnapped them after slaughtering most of their community. Includes historical notes.

Eighth-grade sports reporters Susan Carol and Stevie reunite at the U.S. Open tennis championships where they investigate the mysterious disappearance of a top Russian player.

Kidnapped and sold into slavery, Sophos, an unwilling prince, tries to save his country from being destroyed by rebellion and exploited by the conniving Mede empire.

The wealthy fashion students in Mrs. Carter's boardinghouse spend a quiet spring break in Florida until the boys from Crescent Cove arrive and heiress Eliza goes missing.

In 23rd-century Great Britain, where climate change has caused vast flooding, the piratical raiders kidnap the Prime Minister's daughter and thirteen-year-old Lilly Melkun, an English fishergirl, takes her seacat on a daring rescue attempt, with a mysterious talking jewel from a past computer age tucked in her belt as ransom.

Teenage James has forty-eight hours to rescue a kidnapped professor and to keep a powerful weapon from falling into the wrong hands.

Everything hangs in the balance, and nothing is certain. Rachel has been kidnapped by enemy forces and is being taken to Rowansmark while Logan, imprisoned and awaiting trial, is unable to leave Lankenshire. Separated from each other and their Baalboden comrades, each must find a way to achieve what they desperately want: to rid their world once and for all of the Commander and the tech that controls the deadly Cursed One. Fighting through her pain...

Jacky Faber and her classmates at the Lawson Peabody School for Young Girls in Boston are kidnapped while on a school outing and transported in the hold of a slave ship bound for the slave markets of North Africa.