April, who is wearing the powerful Ravenvine, makes a dangerous journey to the Warren, home of the Keepers, as Horace F. Andrews, Keeper of the Box of Promises, and Chloe Burke prepare to do battle with the evil Riven.

Since his father's death, Ever Barnes has secretly been in charge of an amazing mechanical building but now, ruffians are after him and his new friend Hannah, the building owner's spunky daughter.

Discovering that their talismans of power may be dying out, Chloe, Horace, and their fellow Keepers begin a race to save the world from someone they had considered a friend.

Horace F. Andrews, armed with a strange wooden box, and Chloe Burke, wearing a mysterious dragonfly pendant, become entangled in a secret and ancient society striving to protect powerful devices from the evil Riven.

Dorrie and her brother Marcus accidently open a portal to Petrarch's Library, where they discover a secret society of warrior librarians who travel in time, protecting the world's greatest thinkers from torture and death for sharing knowledge and ideas.

To free himself from an ancient curse, thirteen-year-old Shinji Takahashi must team up with a secret organization of explorers, find a magical font hidden in the jungles of Mexico, and replace a stolen idol.

"What if young Arthur Conan Doyle really went to a secret school for extraordinarily gifted children called Baskerville Hall? When a mysterious man with a pipe notices young Arthur's incredible deductive skills, Arthur's offered a spot at the esteemed Baskerville Hall and a chance to lift his family out of poverty. There Arthur makes quick friends with Irene Eagle, a girl who boldly strides into any adventure, and Jimmie Moriarty, a boy whose brilliance...

Malcolm, a smaller than average rat, loves life at McKenna School and the secret society of classroom pets that keep children out of trouble, but when Aggy the iguana disappears Malcolm must use all of his ratty persistence to prove his innocence and save her.

"For centuries, the Keepers and the Wardens have been guarding the mysterious Mothergates, a source of incredible power. But now the Mothergates are dying, and Horace and his fellow Keepers know that the weakened gates may unleash a dangerous force that will consume the world--and destroy everyone in it. While their enemies are willing to take this careless risk, Horace and his friends are prepared to sacrifice themselves for the preservation of the...

Wielding the Dragon Lantern, the maniacal Philomena Moffet unleashes a monster army on the American continent, forcing Archie to put aside his reservations about his league membership and rally his forces to stop the threat.