I don’t make a habit of reading series, especially if they go more than two or three books, mostly because I’m unwilling to make the kind of investment required to keep all the books’ moving parts front of mind. One series I have made an exception for is Charles Stross’s Laundry Files, a trope-busting mishmash of spy thriller, bureaucratic satire, deadpan humour and Lovecraftian horror in which demonology is a branch of higher mathematics and Chthuloid threats are dealt with by a government bureaucracy, with all that implies.

In The Delirium Brief (Orbit/Tor.com, July) the eighth book in this series, the threat is the British government itself. The story picks up in the immediate wake of The Nightmare Stacks (2016), in which an invasion of, well, elves from a parallel Earth has left the city of Leeds in ruins, thousands dead, and the British public suddenly very much aware of the existence of the Laundry, as the British secret agency dealing with occult threats is known.