Here’s the book description:
Charles Stross takes a departure from his epic science fiction to craft this cross between Len Deighton—style espionage and H.P. Lovecraftian horror.
Bob Howard is a computer-hacker desk jockey, who has more than enough trouble keeping up with the endless paperwork he has to do on a daily basis. He should never be called on to do anything remotely heroic.
But somehow, he is…