@PM, I happened upon the adaptation while browsing hulu one day, and thought it sounded interesting. And then it ended up having Tom Ellis in it, and that made it even better. ;) It was later that I found out it was based on a book, so I decided to check it out. Found a used copy on ThriftBooks.
I hope you like it, though. I have The Secret of Crickley Hall by this same author. Haven't read it yet, but did watch the adaptation on Hulu.