This novella is an urban fantasy police procedural released by Subterranean Press in May of 2019. It is part of Aaronovitch’s Rivers of London series and runs 169 pages. This review contains spoilers.

The setting is Trier, Germany’s oldest city. A dog walker finds a man dead of noble rot, a fungus used in wine production, and circumstances are enough out of the ordinary that local authorities call the Abteilung KDA, a branch of the German Federal Criminal Police that handles supernatural issues. Investigator Tobias Winter, called in from holiday, plans to get there, deal with the problem, and get out with the minimum of paperwork. He teams up with local police representative Vanessa Sommer, and their investigation quickly links the victim with the Stracker vineyards, a pair of river goddesses and a middle-aged men’s social club. There seem to be a lot of issues left unresolved over the last couple of centuries. Can Winter and Sommer make sense of it all?

Good points: This should please fans of police procedurals. The characters are well rounded and have backstories, and the plot is intricate enough that it takes some investigating to find out what old ghosts everyone is hiding. There are a couple of plot twists that change the direction of the investigation, keeping interest up, and the mystery has a satisfactory conclusion. The German setting is different for an urban fantasy, though Aaronovitch admits to making up the vineyard, and the writing style is entertaining. There are some wry ironies lurking in there.

Not so good points: This doesn’t develop a lot of suspense, and the action line is fairly flat until a bump at the end. I didn’t get a strong impression of what the countryside looks like. Also, as the investigation takes shape, it’s fairly clear what is going on, if not who they’re looking for–so somewhat predictable. It’s a good book to curl up with on a rainy day, but not a really exciting read.

Three and a half stars.