This is the first of the "Smoke and" series by Tanya Huff. I know there's three books in it at the moment, but I'm not sure if it's meant to be a trilogy or if it'll have more books eventually. They go after the Blood Books, but they're mostly about Henry and Tony. Although for my tastes there's too much Tony and not enough Henry. But I adore Henry so that's not really a surprise.
The two of them are still living in Vancouver after moving there with Vicki (Vicki of course being long gone by now) and Tony is working as a PA for a TV studio, on a vampire show.
Plot stuff... there's something coming through from another universe and hiding in shadows. Tony, Henry, and the local wizard have to figure out how to stop the shadows and close the gate that's letting them through in the first place.
And I'm finding I don't have a heck of a lot to say about this one. I liked it, but it didn't quite grab me like the Blood Books did.