DCI Pilgrim Thriller Books in Order

The DCI Pilgrim books are the most team-driven of AL Fraine's crime series. Jon Pilgrim arrives in the South of England to join a specialist CID unit and quickly finds himself handling cases that are bigger, messier, and stranger than ordinary murders. In Axe to Grind, he is paired with DS Kate O'Connell and thrown straight into a case involving a murdered young woman, gang links, and a killer who seems to be sending a message.

From there, the series barely slows down.

These books are set around Surrey and the Home Counties, and Fraine gets a lot out of the contrast between postcard landscapes and ugly crimes. One book moves through trafficking and grooming networks, another into an aristocratic family gathered at an estate, another into bodies hidden inside the walls of an ordinary house. The settings look calm on the surface, which only makes the violence underneath them feel worse. It is a good setup for a police thriller because the books are always showing how quickly a respectable place can crack.

Jon is the anchor, but this is not a one-man show. Kate is a major presence, and the supporting detectives matter because the cases often pull on their histories as well as his. Old enemies, escaped killers, unresolved grief, and team loyalties keep surfacing alongside the main investigations. That gives the series a nice balance. Each book has a clear case, but there is still a larger story building in the background, especially around the people Jon has to trust.

The tone sits between police procedural and fast thriller. Fraine is interested in evidence, interviews, and team dynamics, but he never lets the books get bogged down. The stakes are usually immediate. Missing girls need to be found quickly. A child killer from years ago may be active again. Two separate murder cases might be circling the same answer. Jon and his team are nearly always racing the clock, and the books are stronger for it.

If you want the earliest piece of Jon Pilgrim's story, The Doll Killer works as a prequel. It shows him years earlier in Nottingham on a gruesome case of his own, and it also helps connect this series to the later Rob Loxley books. Still, the best full starting point is Axe to Grind, because that is where the Surrey team really takes shape.

Overall, the Pilgrim books are a good fit for readers who like ensemble crime fiction. You get brutal crimes, strong pace, recurring pressure from past cases and past choices, and detectives who have to keep working even when private history keeps leaking into the room. Of Fraine's three main strands, this one probably feels the broadest in scope.