It is London, 1756. In his Bloomsbury attic sits Dr Sabian Blake – astronomer, scientist, and master of the Kabbalah. Dr Blake is in possession of the Nemorensis, an ancient leather-bound book that holds the secrets of the universe. Scribbled into one of its margins is a mysterious prophecy and deciphering it could prove the key to saving London from a catastrophic fate. But there are others interested in the Nemorensis too, for more sinister reasons . . .
Wormwood is an allegorical fantasy novel, with strong Christian imagery throughout. The story centres around a book called the Nemorensis, seen by some as a fount of knowledge and others the Devil’s work. Dr Sabian Blake, owner of Nemorensis at the beginning of the book, finds a prediction in the book of a comet, Wormwood, falling to Earth and destroying London.