The Jennifer Morgue (Charles Stross)

Another Laundry Files novel from Charles Stross. These stories are always a mind-twisting blend of horror (many-tentacled creatures from the murky deeps), police procedure (griping about pencil-neck desk-jockeys who don't know what it's really like out here in the field), and geekery (what else from someone who writes sidekicks named Pinky and Brains?). Bob Howard works for a top-secret British intelligence agency but he's no James Bond. As a computational demonologist, his specialty is understanding how mathematical formulae and computer programs breach the walls between worlds and let those horrors through, forcing the good guys to stop them and clean up the mess according to the proper bureaucratic rules, in triplicate. In this story, Howard starts out attending an international meeting of similar organizations, expecting a boring weekend of conference rooms and PowerPoint, but winds up soul-linked with a demon assassin and dragged to a Caribbean island to stop a megalomaniacal billionaire from stealing a deep-sea artifact that can destroy the world. Of course.  Stross scatters every page with gems that are as smart as they are funny. I have to love an author whose narrator describes the experience of driving a rented Smart Car on the German autobahn "while a jerk is shooting at me from behind with a cannon loaded with Porches and Mercedes."