Peter Grant is guarding a Covent Garden murder scene on a freezing night, career prospects pointing straight at a desk job, when his only eyewitness turns out to have been dead for over a century. Most constables would file that under exhaustion and move on. Peter takes a statement. That instinct, treating the impossible as something you can interview, measure, and write up properly, is the engine of this whole glorious book, and it's what gets him noticed by Detective Chief Inspector Thomas Nightingale: the last official wizard in Britain, the entirety of the Met's magical branch, and suddenly Peter's new governor.
What follows is a proper police procedural that happens to include vampires, river goddesses, and a formal apprenticeship in magic, and I mean proper. Aaronovitch clearly adores the machinery of actual policing, the interviews and case files and inter-departmental turf wars, and instead of magic dissolving all that structure, it gets absorbed by it. Peter approaches spellcraft like the architecture nerd and frustrated scientist he is: running controlled experiments, burning out mobile phones to figure out why magic wrecks microprocessors, taking notes like a lab assistant. Watching a fantasy hero ask HOW does this work, repeatedly, with follow-ups, is ridiculously satisfying. It grounds every marvel the book throws at him.
And London! The city is flat-out the second protagonist. Aaronovitch writes it with a cabbie's knowledge and a historian's grudges, every chase and crime scene pinned to real streets and real centuries of accumulated grime. The title isn't decoration: the rivers of London are personified, an entire feuding family of them, and the negotiation between Mother Thames's court downstream and Father Thames's crew upstream gives the book its richest thread. Beverley Brook alone, a river as a young woman with an attitude and a Mercedes, justifies the premise. Peter being mixed-race, London-raised, and cheerfully unimpressed by mythology gives the folklore friction; he talks to gods the way he'd talk to a difficult witness.
The case itself is nasty in the best way. Something is hijacking ordinary Londoners and twisting their faces into a rage-fueled grotesque out of a puppet show, and the violence, when it lands, is genuinely shocking against all the wit around it. That tonal whiplash is deliberate and mostly it works, though the book is honestly running two plots, the possession murders and the river feud, and they only half-braid together by the end. The middle stretch wanders, subplots multiply, and readers who want a tight single-thread mystery will feel the sprawl. I'd also gently warn that Peter's narration, funny as it is, has an early-2010s lad streak in how it clocks every woman's looks; it mellows as the series matures.
Why you should read
- Urban fantasy fans who want real police procedure
- Dresden Files readers ready for a London accent
- Anyone who loves city-as-character writing
- Readers who like their magic with lab notes
- Series readers looking for a long, rewarding run
What to expect
- Witty first-person narration with London geography lessons
- Two loosely braided plots and a wandering middle
- Sudden gruesome violence amid the comedy
- Magic treated as a science worth experimenting on
- Strong series setup with drawers left open
But the sprawl is also the point. This first book is Aaronovitch unpacking a toybox he'll spend a dozen sequels playing with, and the pleasure of the Folly, of vestigia and Latin forms, of Molly the unsettling housekeeper and Toby the ghost-sniffing dog, is the pleasure of a world with drawers left deliberately ajar. By the final confrontation, staged where the book's twin obsessions of theater history and street-level policing collide, I was already reaching for the sequel. Magic with procedure, myth with paperwork, and a hero who responds to wonder by opening a notebook: this series starts exactly as it means to go on.
