The Atrocity Archives by Charles Stross
Given that it’s basically a Lovecraftian spy thriller, I expected to like this a lot more than I actually did. However, the nonstop snarky tone got tedious after awhile, as did all of the spy lingo and technobabble. There are apparently a dozen novels in Charles Stross’ Laundry Files series as well as various novellas and spin-offs. I’m good, however, after just this one.