DC O'Connell Books in Order

The DC O'Connell books are where AL Fraine's crime world really begins. At the center is Kate O'Connell, who wanted to become a detective after the murder of her aunt in Ireland. That loss is not just backstory. It shapes how she sees violence, how quickly she takes things personally, and why the job matters so much to her. If you want the emotional starting point, First Hand shows Kate years before she joins the police.

Then The Upper Hand throws her straight into the deep end.

Kate's first proper case on the Surrey Murder Team looks like an occult sacrifice, and that eerie edge runs through the whole series. Idle Hands revolves around kidnapped models and an abandoned mental asylum. Out of Hand begins with a murder in a private library full of occult books. Fraine uses ritual imagery, secretive interests, and strange staged crime scenes to give the books a creepy feel without turning them into outright supernatural fiction. The effect is unsettling rather than fantastical.

The setting matters too. These books sit in Surrey and the affluent Home Counties, just outside London, and that contrast is part of the appeal. Big houses, tidy roads, and well-kept woods keep giving way to messy private lives and vicious crimes. Kate is constantly reminded that respectable surfaces do not mean safe people. The series has a modern police-thriller pace, but there is also a steady undercurrent of conspiracy and past damage running beneath the investigations.

A big part of the series is the partnership between Kate and Nathan Halliwell. He arrives with his own baggage, she arrives desperate to prove herself, and the trust between them takes time to build. That gives the books more than just casework. You get professional friction, shared danger, and an ongoing thread about whether they can rely on one another when the pressure rises. Read in order, the relationship lands much better.

What links the trilogy is the sense that Kate's past is never really settled. New cases keep brushing up against old trauma, and the feeling that there is something larger behind events never quite goes away. That is why these books feel more tightly connected than a simple case-of-the-week series. Each investigation stands on its own, but each one also pushes Kate a little further toward answers she has wanted for years.

If you like crime fiction with a darker mood, a strong central partnership, and just enough occult flavor to make the murders feel especially unsettling, the DC O'Connell books are a solid place to start. They are the earliest AL Fraine crime novels, and they do a lot of the groundwork for characters and themes that matter later in the linked books.