Cornelia has trouble stopping the trees and flowers when they start to blossom out of control, so she and the other Guardians must travel to another world in order to solve the problem.
Having locked the Raven's gate, fourteen-year-old Matt travels to Peru where he meets the second of the five gatekeepers and works with him to try to stop the opening of a second gate somehow related to the Nazca Lines.
A deadly, flu-like epidemic and a plague of flesh-eating creatures threaten the lives of the children at Perdido Beach while Sam, Astrid, Caine, and Diana each struggle with doubts and uncertainties.
The orphan Bod, short for Nobody, is taken in by the inhabitants of a graveyard as a child of eighteen months and raised lovingly and carefully to the age of eighteen years by the community of ghosts and otherworldly creatures.
Just as Sophie comes to accept her demonic powers, the Prodigium Council takes them away, leaving her defenseless and at the mercy of a family of warrior women.
When a spectral robed figure haunting the halls of Gotham Academy begins appearing before Olive and giving her sinister instructions, it may be the key to unlocking her family's past if Olive does not lose her grasp on reality first.
Sixteen-year-old Ruby breaks out of a government-run 'rehabilitation camp' for teens who acquired dangerous powers after surviving a virus that wiped out most American children.