Caitlin Kittredge: Black London

I had not ready anything yet by Ms. Kittredge, but decided to check out Street Magic (Black London, Book 1) a few weeks ago. I think it's the first novel I have ever read about about a London police officer.
DI Caldecott works at Scotland Yard and is a bit haunted by a few events from her past, and doesn't believe in magic.
It was good enough that, as soon as I finished Street Magic, I immediately read Demon Bound (Black London, Book 2).

The feel of the novel reminded me a bit of Simon R. Green's Nightside novels. I think mainly because of the dark feel, and wandering down the random streets in order to transition into the Black, a parallel world.

I am starting to notice a trend in my reading habits lately -- how come I started reading all these parallel world novels?