The Atrocity Archives (Laundry Files, 1) [Stross, Charles]

Bob Howard is a low-level techie working for The Laundry, a super-secret government agency. While his colleagues are out saving the world, Bob's under a desk restoring lost data. None of them receive any thanks for the jobs they do, but at least a techie doesn't risk getting shot or eaten in the line of duty. Bob's world is dull but safe, and that's the way it should have stayed; but then he went and got Noticed. Now, Bob Howard is up to his neck in spycraft, alternative universes, dimension-hopping nazis, Middle Eastern terrorists, damsels in distress, ancient Lovecraftian horror and the end of the world. Only one thing is certain; it will take more than control-alt-delete to sort this mess out...