The Apocalypse Codex

For outstanding heroism in the field (despite himself), computational demonologist Bob Howard is on a career fast-track within the Laundry, the branch of the Secret Service that fights otherworldly threats. But when he is called to investigate a miracle-working American televangelist who seems suspiciously interested in the Prime Minister, Bob finds an occult mess that even the Laundry may be unable to cleam up...