This is a great development. Hopefully this is just a sign of things to come and more characters will get their own books, series, short stories, etc.
I maybe wrong, but from that little blurb Thomas isn't getting his own little story, series, or whatever. It sounds like it will be like all the other Dresden stories, ie told from Dresden's point of view.
This does sound awesome though.
However, I want to know a release date, and whether or not I can buy this off of Amazon. Hopefully so.