Kami Garcia is known for being the coauthor of the Beautiful Creatures series. The first book in her new Legion series, Unbreakable, is due to be released on October 1, 2013 by Little, Brown Books for Young Readers. It's intended for hardcover release and will stand at roughly 320 pages.
When Kennedy Waters finds her mother dead, her world begins to unravel. She doesn’t know that paranormal forces in a much darker world are the ones pulling the strings. Not until identical twins Jared and Lukas Lockhart break into Kennedy’s room and destroy a dangerous spirit sent to kill her. The brothers reveal that her mother was part of an ancient secret society responsible for protecting the world from a vengeful demon — a society whose five members were all murdered on the same night.
Now Kennedy has to take her mother’s place in the Legion if she wants to uncover the truth and stay alive. Along with new Legion members Priest and Alara, the teens race to find the only weapon that might be able to destroy the demon — battling the deadly spirits he controls every step of the way.