Inhalt: Dr Walden is the Director of Magic at Chetwood School and one of the most powerful magicians in England. Her days consist of meetings, teaching A-Level Invocation to four talented, chaotic sixth formers, more meetings and securing the school's boundaries from demonic incursions. Walden is good at her job — no, Walden is great at her job. But demons are masters of manipulation. It's her responsibility to keep her school with its six hundred students and centuries-old legacy safe. But it's possible the entity Walden most needs to keep her school safe from … is herself.