After leaving with the murdered body of her deranged sister, Jack discovers that something has gone very wrong upon her return to Eleanor West's School for Wayward Children.

When a mysterious voice claiming to be God instructs her to bring her terminally ill twin to a remote location in the Arizona desert, Indigo, fearing she is losing her mind, organizes a trip with her dysfunctional family that reveals shocking truths about those closest to her.

After the apocalyptic Omega, a group of orphaned teen boys learn of their dark fate and escape and join forces with twin girls who have been imprisoned for the "good of the Republic," as they all must find the best in themselves to fight against their enemies.

Bradley, Brian, Nate, and Lucy follow clues to find whoever left a rabbit in their first-grade classroom on Valentine's Day, because they are worried the rabbit will get sick and die of loneliness.

The Kidd children--including twelve-year-old twins Rebecca and Bickford--follow mysterious clues that take them from China to Germany, in the hopes of finding their missing father and the treasure that will finally free their kidnapped mother.

Seven-year-olds Bradley, Brian, Nate, and Lucy make observations and gather clues that convince them that their older siblings, cousin, and animals have been captured by hungry space aliens.

Having been reunited with their zombie father only to have him turn into a vampire after drinking an experimental elixir of life, the ten-year-old Shluffmuffin twins continue to try to elude the giant ants who want to enslave all humans.

Bradley, Brian, Nate, and Lucy visit a haunted hotel on Halloween, but once inside they realize that they have seen plenty of people going in and none coming back out.

Twelve-year-old identical twins Jay and Ray have long resented that everyone treats them as one person, and so they hatch a plot to take advantage of a clerical error at their new school and pretend they are just one.

Leaving Dev to face the Revinir alone, Thisbe leads a group to Artimé to help Fifer, Aaron, and his allies combat the reckless new head mage, Frieda Stubbs.