He lives on a boat called Nostromo (named as such because Alien is one of his favourite films) and can be found somewhere on the Grand Union Canal, probably drinking tea and daydreaming. [Source]
Author's Comment: Since I was young I’ve been fascinated by dark, macabre and mysterious tales – especially if they have their roots in history. And there was a time when people believed in magic and demons, and when witches really existed. Usually they were harmless women who used a mixture of herb-lore and magic to cure the sick. Nevertheless, witches were subjected to the most appalling prejudice and violence, particularly in mainland Europe. The more I learned about it the more it seemed to me to be a fertile place from which to grow a story.