“Bob.” She stopped short of rolling her eyes, but I could see she was bored, and growing more annoyed by the minute: “Eat your baby tentacle monsters before they go cold.”

Mo has an aversion to pseudopods. When we first met, some very unpleasant people were trying to sacrifice her in order to summon an alien horror from beyond spacetime. I’d distracted them long enough for the seventh cavalry to arrive, and sometime after that Mo and I had started dating—but she still couldn’t (and can’t) stomach calamari. I cleaned my plate and watched as she finished her soup.

“I’m done here,” she announced, picking up her violin case without asking whether I was still hungry. “I’m going home.”

Which is why I didn’t get a chance to apologize for dragging Pete into the business in Colorado Springs. Or to explain my hypothesis about what vampirism really was, and what I was doing about it. Or to save our marriage.

• • •

THE NAME’S HOWARD, BOB HOWARD. I’M A COMPUTER SCIENCE graduate and IT person, and I work for the British government in London, as does my wife Mo, Dominique O’Brien, who is a few years older than I am but still (in my opinion) a gorgeous redhead.

That’s the mundane version, cleared for public consumption. It is also deeply misleading, but it’s the version I’m allowed to give to friends and family without being required to kill them, so we’ll call that a net win. It’s also not entirely false.

The secret organization I work for is commonly called the Laundry because when it was established in its current form in 1940 it was based above a Chinese laundry in Soho. As Q Department, SOE, it was tasked with waging an occult war against the Ahnenerbe-SS. Today, the name may have changed several times but it’s the same organization—the one you have just been admitted to, if you’re reading this classified journal and your hair isn’t on fire due to the security wards on the cover.

I’m actually a specialist in a field called Applied Computational Demonology: the summoning and binding to service of unspeakable horrors from other dimensions, by means of mathematical tools. Magic is a branch of applied mathematics: we live in a multiverse, there is a platonic realm of pure numbers, and when we solve certain theorems, listeners in alien universes hear the echoes. By performing certain derivations and manipulating theorems, we can make extradimensional entities sit up and listen, and sometimes get them to do what we want them to. True names have power: you should assume that any names or locations I give you may have been changed in the interest of security.