A fascinating read especially for those who will enjoy Ackroyd's exciting blend of spiritual fantasy with academic historical research and modern fact. The characters pull you into the story and the sense of mystery is sustained throughout. His love for and fascination with London and what existed, may have existed and still may exist is absorbing - it inspires the reader to tread the modern pavements as he has done, in search of those traces of the past. He evokes the sounds, sights, smells and atmosphere of all times with equal vividness.
Having already read several of his: Hawksmoor, Dan Leno and The Limehouse Golem, the History of the Thames etc, I wish I'd read this first because it is perhaps not quite as masterly as those others. But it was nevertheless a treat.