Oliver Wormwood is sure his new job in the library will be boring. Until he learns that books hold great power -- and danger. By the end of his first day, Oliver has witnessed a death, been frozen by a book, met a perplexing number of cats, and fought off a horde of terrifying creatures. With only a mysterious girl called Agatha to show him the ropes, Oliver needs to learn fast... if he wants to live longer than the 112 assistant librarians before him.