Lenora returns to the magical Library—which holds every book ever known on its shelves. But she discovers the Library is under new management, its incredible rooms and corridors turned sinister and oppressive. Lenora quickly connects with a secret resistance that’s trying to free knowledge from the darkness threatening it. Her new friends introduce her to an ancient lost city, hang-gliding, and mathematical beings larger than the universe itself. In its starred review for The Library of Ever, Kirkus called it "unusually clever," BCCB named it "utterly enchanting," and Booklist said it’s "for every person who has ever believed that libraries are magic." Now Lenora returns to fight to prove that knowledge is always more powerful than ignorance and fear.