The October Man

The October Man, from 2019, also takes us away from London, though not as far as Winter's Gifts. In this novella, we are in Germany and our narrator is Tobias Winter, who basically has Peter Grant's job (and, it must be said, almost exactly Peter Grant's voice...)

Set in the wine-growing town of Trier, our first mysterious corpse has been choked by mould, which proves to be 'noble rot,' used in wine making. But there's a tangled backstory that involves German river goddesses, ancient wizards, a men's social group, an attempted rape twenty years ago, layers of German bureaucracy and fun compound words, and an over-enthusiastic assistant.

The October Man doesn't really contribute anything extra to the main Rivers of London narrative, apart from a vague warning that magic is increasing, but it's a fun excursion. What's the point of creating this rich, sprawling universe if you don't explore its outer reaches now and then?