The protagonist of both stories is computer expert Bob Howard, who re-discovers certain mathematical equations that contact other worlds. The Laundry detects the disturbance and swoops in to give him a mandatory job offer. ("I thought I was just generating weird new fractals; they knew I was dangerously close to landscaping Wolverhampton with alien nightmares.") From his position in the Laundry, a secret British occult intelligence organisation, Howard is allowed to learn something of the secret history of the world, as well as the various modern counter-measures the Laundry has adopted to deal with these threats. Despite the nature of the work, the Laundry is an efficient and low-key modern organization; more cubicle-jockeying than stately mansion towers and hidden volcano lairs, in other words. A tag-line used for the books by publisher Ace Books was "Saving the world is Bob Howard's job. There are a surprising number of meetings involved."