Princess Tania thinks she has finally found a way to unite the world of Faerie with the modern world, but her beloved Immortal Realm is threatened when a grave illness takes hold of the kingdom and she must find a way to save it.

California high school students Kaida, Zeke, and Joy fall into a parallel universe in which all resembles their normal lives except that there is no medicine nor health care, which could mean big trouble for Joy, whose arm was injured in the accident that started their troubles.

"With her parents off traveling the globe, Lenora is bored, bored, bored -- until she discovers a secret doorway into the ultimate library. Mazelike and reality-bending, the library contains all the universe's wisdom. Every book ever written, and every fact ever known, can be found within its walls. And Lenora becomes its newly appointed Fourth Assistant Apprentice Librarian. She rockets to the stars, travels to a future filled with robots, and faces...

Thirteen-year-old Rory discovers a spirit world that thrives alongside his contemporary New York City, filled with fantastical creatures and people from the city's colorful past who have become gods and goddesses and who have chosen Rory to perform a dangerous mission.