Whitechapel, London 1877 Sibelius Darke is a post-mortem portrait photographer, specialising in family photographs for the relatives of the recently deceased. He is a man rising to the top of his profession. The rich and the powerful wish to acquire his services and he is only too willing to do what he must to attain his dreams. However after hearing a warning from the mouth of a dead child, a Demon from mythology begins to stalk the streets of Victorian London. A beast from Darke's own childhood nightmares. Seen as a suspect in the eyes of the police, can he stop the killer himself? Or will it take and destroy everything that he holds dear? Memento Mori is a Supernatural Murder Mystery novel set in late Victorian London.