The Wolves of London
Psychology professor Alex Locke is an ex-convict, forced back into the criminal underworld when his daughter is threatened. After he agrees to steal a mysterious Obsidian Heart, Locke is pursued by unearthly assassins known as the ‘Wolves of London’. Soon he discovers the heart can enable him to travel through time, and while it bestows him with his own dark powers, it also corrupts...
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Mark Morris
Mark Morris (born 1963) is an author most well known for his series of horror novels, although he has also written novels based on the BBC Television series Doctor Who. He currently lives in Tadcaster, North Yorkshire, with his wife (the artist Nel Whatmore) and their children, David and Polly. He has used the pseudonym J. M. Morris for the novel Fiddleback.
Obsidian Heart
Obsidian Heart consists of three books. The current recommended reading order for the series is provided below.

