Around mid-2002, while Al and I were finalizing the edits and such on his novella, I began seeking out an author for the next title in this chapbook series. Howard Waldrop had already committed to writing a chapbook story -- what became A Better World's in Birth!-- and for those of you who know Howard, you'll understand when I say that it took a year for his story to be completed and published. So, in the interim, I was looking for another author and story. (I wasn't successful, but not for lack of trying; the Waldrop novelette was actually the second published chapbook in the series.)

Charlie sent a reply that very same day:
"Firstly, I'm up to my eyeballs in work right now. I'm writing a series for Asimov's SF which will turn into a fix-up novel [Accelerando, Ace 2005], I'm working on book #2 of a contract for Ace [Iron Sunrise, 2004], and my agent is hoping to sell a tetralogy [Merchant Princes series] -- only one book of which is written so far! -- in the next couple of months. (Meaning, yet another big fat novel to write.) Therefore I almost certainly won't have time to write an original novella for you before March of next year.... However, if you're willing to settle for slightly-less-than-100%-original.... There's a second possibility, but this one is slightly offbeat. You may have seen my short novel "The Atrocity Archive", which Paul Fraser is currently serialising in Spectrum SF. It's 76,000 words long; he's running it in issues #7 through #9. Book rights to this short novel have not been sold; my agent is focusing on my SF work... [this is] a borderline horror/SF/thriller crossover... If you'd like to look at it I'd be happy to send you a copy and if necessary get [my agent] Caitlin Blasdell to talk to you about rights.... let's meet up and chat about things at ConJose."
It just so happened that I already had issues #1 through #8 of Spectrum SF, but issue #9, containing part three of "The Atrocity Archive," hadn't been published as yet. So, Charlie graciously sent me a file version of the complete novel for my reading pleasure. But what intrigued me even more so about "The Atrocity Archive" -- enough to request the full novel file from Charlie (remember, I hadn't yet read the final part 3) -- was Nick Gevers's review in the August 2002 issue of Locus Magazine. Nick concluded his review with the following paragraph:
"The climactic scenes of The Atrocity Archive -- battles in the snow beneath a galaxy of dying red suns -- form one of the most compelling and intellectually engaging narrative sequences in the SF canon, the logics of demonology and physics in astonishing tandem. Sequels are possible; they surely must come; but for the time being, the priority should simply be to see The Atrocity Archive published in proper book form after the limited availability of its serialization in Spectrum SF."
After reading that first sentence, re: "one of the most compelling and intellectually engaging narrative sequences in the SF canon," there was no way I was going to pass up an opportunity to be the one to acquire and publish this novel. However, I typically acquired books that were between 90,000 and 120,000 words, and Charlie had told me that "TAA" clocked in at about 76K words. So on August 19 [I know, I'm getting way ahead of myself, as this is after the WorldCon] I emailed Charlie and asked if he would be agreeable to writing an afterword -- I was thinking in terms of a two- or three-page afterword on the genesis of the novel; I also asked Charlie if he could recommend a fellow author to pen an introduction to the book. Charlie suggested Ken MacLeod for the introduction, and he also responded that "An afterword is possible." Fortunately, Ken agreed to contribute an introduction, and Charlie did indeed write an afterword -- a 5,550-word afterword entitled "Inside the Fear Factory," in which he made a case for the thriller novel as horror; he also wrote about British author Len Deighton, famous for his spy thrillers (e.g. The Ipcress File), and the influence behind the writing of "The Atrocity Archive."
"Alternatively, can I interest you in a stand-alone novella about Bob, set not too long after the events of 'The Atrocity Archive'? I was going to write it for Spectrum SF, and would still like a chance to throw it at Paul, but if you insist on some 100% original content my arm can be twisted.3
Background: ...the novella, 'The Concrete Jungle', is a separate part of the story: it falls naturally between novels #1 and #2. It's about basilisks, the mystical significance of the Milton Keynes bicycle path network, Bob's evil scheming line manager, and what the British government is really spending money on in place of ballistic missile defense. 'The Concrete Jungle' is about 25% written, with a design length of 25,000 words, and was basically waiting for me to have an excuse -- and time -- to finish it."

In the world of "The Atrocity Archive," Alan Turing, the Father of Modern Computer Science, did in fact complete his theorem on "Phase Conjugate Grammars for Extra-dimensional Summoning." Turing's work paved the way for esoteric mathematical computations that, when carried out, had side effects that would leak through the platonic realm of pure mathematics underlying the structure of the Cosmos. Out there in the multiverse there were "listeners" -- and sometimes these listeners could be coerced into opening gates. Small gates through which minds could be transferred and, occasionally, large gates through which objects could be moved.
In 1945, Nazi Germany's Ahnenerbe-SS, in an attempt to escape the Allied onslaught, performed just such a summoning on the souls of more than six million. They opened a gate to an alternate universe through which the SS could move men and matériel. But their summoning brought forth more than the SS had bargained for -- an Evil, patiently waiting for countless eons, now poised to lunch on our galaxy, on our very own Earth.
The protagonist in these novels and stories is Bob Howard (not his real name; and I'll leave you to determine the origin of this alias) -- a geekish demonology hacker extraordinaire -- who works for a supersecret intelligence organization known as "the Laundry," formerly the Q Department in Britain's Special Operations Executive (SOE). Whereas the SOE was officially disbanded in 1945, following World War II, the Laundry was secretly maintained and exists to this day. When Bob's not trying to save the world from unearthly horrors, he has time sheets to complete and field liaison meetings to attend. The Laundry Files are a unique mix of the British espionage thriller, Lovecraftian horrors, non-Euclidian mathematics, computer hackerdom, and Dilbert-style office management.