Kate Marshall (Robert Bryndza) Books in Order

The Kate Marshall books are Robert Bryndza's private investigator series, and they have a slightly different feel from the Erika Foster novels. They are still dark, twisty crime stories, but there is more room for old cases, local rumors, and the slow unpicking of events that other people have already written off. Kate herself is the key to that mood. She was once a rising Metropolitan Police detective, until the case that should have made her career destroyed it instead.

Reinvention is the heart of these books.

When Nine Elms begins, Kate is living with the wreckage of that past. She had exposed a serial killer who was also her lover and the father of her child, and the fallout nearly ruined her life. Years later she is older, tougher, and trying to rebuild. She eventually opens a private detective agency with Tristan Harper, a loyal researcher and partner whose steadiness balances Kate's harder edges.

That partnership gives the series its shape. Kate brings instinct, experience, and a willingness to push where others stop. Tristan brings patience, method, and a human touch that keeps the investigations from turning cold. Together they work cases involving missing people, suspicious deaths, and crimes that have had years to settle into half-truths. Bryndza is especially good at showing how one bad assumption can harden into an official story, and how difficult it is to break that story open again.

Setting matters a lot here. The books are rooted in Ashdean, a coastal town with beaches, cliffs, moors, reservoirs, and plenty of lonely spaces where bad things can stay hidden. That landscape gives the series a chilly, atmospheric feel. It also suits the kinds of mysteries Kate takes on, because these are often cases where the truth has literally been sitting out in the weather for years.

Tristan is a big part of why the series works.

Without him, Kate's world would be much harsher. Their conversations and working rhythm give the books warmth, even when the plots turn grim. The ongoing tension usually comes from two directions at once: the case in front of them, and the parts of Kate's own past that keep rising back up. She wants answers for clients, but she is also trying to prove to herself that she is still the investigator she once was.

If you like crime fiction with cold cases, uneasy landscapes, and a lead character fighting her way back from an old disaster, this series is a strong place to start. Nine Elms gives you the full backstory, and from there the books keep widening Kate and Tristan's world without losing the private, grounded feel that makes the series stand out.