As he’s done for several of his books, Charles Stross gives some interesting background on The Delirium Brief, the latest book in the Laundry series of spies-meet-H.P. Lovecraft stories:
The Delirium Brief (US edition)
It should be fairly obvious by now that, although initially the stories were set in the same year as publication, the Laundry universe has now dropped behind the real world calendar and diverged drastically from our own history. The Annihilation Score was set during the summer of 2013, in a UK suffering from a surplus of superheroes (or at least extradimensional brain-eater afflicted humans experiencing outbreaks of eldritch powers before their heads exploded: some of whom assumed that donning skin tight lycra and committing vigilante crimes was a sensible reaction to being parasitized). It reached a conclusive and grisly climax in the massacre at the Last Night of the Proms, an annual British cultural event; a horrible event the true nature of which was, nevertheless, suppressed and presented to the public as a terrorist incident not unlike the Moscow theater hostage crisis of 2002. At the end of The Annihilation Score the Laundry’s cordon of secrecy was in tatters but plausible deniability had been maintained—barely.
The Nightmare Stacks takes place in March-May 2014, and is the story of how the continually escalating threats faced by the Laundry finally overcame the agency’s ability to suppress and contain incursions without public notice, and is the first half of a two-book pivot point in the series (the ongoing consequences of the disaster in Leeds continue to the inevitable conclusion in The Delirium Brief); it’s the beginning of the tumble over the cliff-edge leading down to the Lovecraftian Singularity.
And we have a new narrative viewpoint, and sundry new protagonists showing up.
Many readers commented on the absence of Bob from The Annihilation Score and The Nightmare Stacks. Bob is back as the primary (but not the only) viewpoint in The Delirium Brief, but we’ve reached a point in the series where he has to be deployed with extreme parsimony. After fourteen years in the Laundry Bob is, despite his ongoing self-deception, not entirely human: watch what he does, not what he says. In The Rhesus Chart he walked into a nest of vampires and came out with his hair mussed but basically intact. You can’t use a guy like that routinely in an ongoing series without either sacrificing the sense of jeopardy (will our hero survive?) or escalating the threats he faces drastically. So Bob took a break for The Nightmare Stacks and was replaced by a plausible Bob 2.0 — a young PHANG called Alex Schwartz, introduced as a minor character in The Rhesus Chart.
[…]
Spoiler (for the record): The Laundryverse and the Merchant Princes multiverse do not coexist in the same fictional universe. (Who do you think I am, the elderly Robert A. Heinlein?)
