Fan Casting The Atrocity Archives

The Atrocity Archive is the first novel in The Laundry Files by Charles Stross. The Atrocity Archives (note the plural) is a book which bundles the aforementioned novel with the Laundry short story, "The Concrete Jungle". Bob Howard is an IT guy who stumbled across Secrets Man Is Not Yet Ready To Know. (Most such secrets turn out to involve advanced mathematics.) As a result, Bob has been recruited, willy-nilly, into the Laundry, a top-secret agency which protects the UK from occult threats. This is not as exciting as it might sound. Despite their unusual remit, the Laundry is still a government agency; bureaucratic, hide-bound, and prone to management fads. And Bob is just a mildly frustrated guy who fixes the computers.