Beneath London's Fog by Iona Caldwell
"I want it known before this tail begins, I am not the hero but the villain." Jonathan is the immortal master of Raven Hollow Manor - a decrepit mansion riddled with superstition, murder and restless ghosts. Beneath it lies a restless malice.
Its previous owner driven mad, violently kills his guests with a rusted ax, creating the perfect venue for Jonathan to seclude himself in a prison of his own device.
When the streets of London begin to run red with blood; the bodies exhibiting disturbing signs and baffling wounds, the identity of the killer remains elusive to police.
The bodies are just the beginning of Jonathan's troubles. A mysterious letter accusing Jonathan of committing the murders appear, raising suspicion in the police. Hidden beneath the mangled bodies, Jonathan soon realizes he is being forced to face demons he thought died in a forlorn past he attempted to escape.
One thing Jonathan knows for certain: He must deal with the demons of his past if he is to survive his future. Not only him but those he has come to love as well.