On the hundredth anniversary of the erection of a high school building by an architect considered to be insane, the misdialing of locker combinations may turn the structure into a gateway to hell unless students Dante, Miranda, and Vincent can help historian Dr. Spangler stop it.

When seventh-grader Ellie, who is having best-friend problems, and eighth-grader Jack, who is under tremendous pressure from his father, switch bodies and lives, they learn a great deal about themselves and the opposite sex.

"With the help of some unexpected, and rather ghostly, allies, Lockwood & Co. must battle their greatest enemy yet, as they move ever closer to the moment when the earth-shattering secret of 'the problem' will finally be revealed"--

Meg Finn is in trouble. She's dead, but not at peace--she's in limbo, her good deeds perfectly balanced against her bad deeds; Heaven or Hell wait, a tip of the scale away. So she's back on Earth trying to tip the scale to the good by helping her last victim, and her former "partner" is also back, trying to force her to tip the scale to the bad.

While fleeing from Mozambique to Zimbabwe to escape an unwanted marriage, Nhamo, an eleven-year-old Shona girl, struggles to escape drowning and starvation and in so doing comes close to the luminous world of the African spirits.

As a mermaid versus human war looms on the horizon, Luce falls in love with her sworn enemy Dorian and assumes her rightful role as queen of the mermaids.

To stop the evil corporation Nightrise from unleashing its devastating power around the globe, fifteen-year-old Matt and three other Gatekeepers travel to Hong Kong to find Scarlet, the final Gatekeeper, whose fate is inextricably joined to their own.

Tom is dismayed when his master the Spook decrees that they will be spending the winter on gloomy and forbidding Anglezarke Moor but soon discovers the reason for his master's decision, as they tangle with two dangerous witches and struggle to keep a dark mage from resurrecting an ancient evil.

Mercy, an angel, wakes up again and again in different bodies, trying to earn her way back into heaven while being hunted for a crime she did not commit.

While helping the Omega team track down down the identity of the original thirteen zombies in New York City, Molly tries to keep her mother's secret and uncovers a sinister plan of the undead.