Wormwood - G. P. Taylor

It is London, 1756, In His Bloomsbury attic sits Dr Sabian Blake - astronomer, scientist, and master of the Cabala. Dr. Blake is in possession of the Nemorensis, an ancient leather-bound book that holds the secrets of the universe. S cribbled into one of its margins is a misteryous 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...
This tale of sorcery, treachery, intrigue and supernatural strife from the author of the international bestseller Shadowmancer is set against a rich historical backdrop and will enthrall readers to the very last page.