12-year-olds storie

Anastasia "Ana" Holland moves to Oxford in which it has a dark secret: Dark forces are at work in the world, and many children have been kidnapped and transformed into Mystical Animals by the beautiful, wealthy but manipulative librarian Charlotte Blackmore. After encountering her, Ana's sisters, Celia and Fay disappears. To save them, Ana sets out with the three Mystical Animals, a sorceress, an ice bear, a archer, and a airman on a epic quest to rescue Celia, Fay, and the rest of the missing children and save her world.