Alexandra Barnaby adventure.

When eleven-year-old Gregor and his two-year-old sister are pulled into a strange underground world, they trigger an epic battle involving men, bats, rats, cockroaches, and spiders while on a quest foretold by ancient prophecy.

With Meg Murray's help, the dragons her six year-old brother saw in the vegetable garden play an important part in his struggle between life and death. "A companion to Newbery Award winner, A wrinkle in time."

Sam's peaceful existence in his wilderness home is disrupted when his sister runs away and his pet falcon is confiscated by a conservation officer.

Janner, Tink, and Leeli Igiby experience many fantastic adventures while looking for a lost treasure.

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.

Accompanied by an eccentric, human-sized rat, Liza embarks on a perilous quest through an underground realm to save her brother Patrick, whose soul has been stolen by the evilest of creatures--the spider-like spindlers.

When her brother is killed, brilliant marine architect Hannah Bryson must discover the volatile mystery behind a decommissioned Soviet submarine, Silent Thunder, that was recently purchased by the U.S. government for use as a maritime museum. Though the U.S. government tries to warn Hannah away, she'll stop at nothing to find the ruthless mastermind behind her brother's death. Even if it means joining forces with a mysterious man who may be even more...

After narrowly escaping the menacing clutches of the dastardly Count Olaf, the three Baudelaire orphans are taken in by a kindly herpetologist with whom they live happily for an all-too-brief time.

Laia and Elias fight their way north to liberate Laia's brother from the horrors of Kauf Prison, a mission that is complicated by hunting Empire soldiers, the manipulations of the Commandant, and lingering ghosts from their pasts.