Inspector Mercer Books in Order

Inspector Mercer is not a long series in the same way Patrick Petrella or Hazelrigg is, but he leaves a strong mark. He arrives in The Body Of A Girl, and from the start you can feel Gilbert working in a harder, rougher register. Later short stories keep Mercer in play, especially in The Man Who Hated Banks, but the real appeal here is the character himself: sharp, dangerous, and not especially interested in behaving like a gentleman detective.

William Mercer comes to Stoneferry-on-Thames as a new chief inspector, taking charge in a place that looks quieter than it really is. He is young for the job, physically imposing, scarred, and plainly not cut from the same cloth as Gilbert's more measured detectives. Hazlerigg solves by calm concentration. Mercer pushes. He has an outsider's edge, and Gilbert makes it clear that he is willing to bend rules if they get between him and the truth.

That changes the whole feel of the series. The Body Of A Girl begins with old bones on a Thames island, but it does not stay a straightforward body-identification puzzle for long. Missing local women, shady garages, hot cars, and the gang known as the Crows all start to connect. Mercer moves back and forth between local gossip and outright violence, with Chief Superintendent Morrissey adding another layer of police pressure above him.

The Mercer stories are still tightly plotted, because Gilbert never stops caring about structure. But they are less interested in parlor-room explanation and more interested in force, pressure, and the moment when a small clue opens into something ugly. The river, the suburban fringe, the garages, the side streets, all of it matters. Mercer belongs in those spaces. He is not a drawing-room detective, and the books are better for it.

He is also useful as an outsider. Mercer understands criminals, but he chose the police. He can move through respectable society, yet he never seems impressed by it. That gives the stories a tense moral current. You are always aware that order and disorder sit much closer together than people would like to admit.

So if you want cozy village detection, this is the wrong series. If you want a tougher Michael Gilbert, one who mixes procedure, underworld pressure, and sudden violence without losing control of plot, Inspector Mercer is worth your time. It is a small corner of Gilbert's work, but a memorable one.