Kaz Phelps Books in Order

The Kaz Phelps books are gritty crime novels built around one hard question: can you ever really leave your family behind? In The Informant, Kaz comes out of prison after taking the fall for a botched robbery that should have landed her younger brother Joey inside instead. She wants a clean life, sobriety, art, and distance from the Essex gangster family that helped wreck her. Joey has other ideas.

That setup gives the series its tension from the first pages. Kaz is pulled between blood loyalty and survival, between the version of Joey she wants to remember and the violent man he has become. At the same time, DS Nicci Armstrong is trying to bring Joey down. The books are full of cops, gangsters, lawyers, and political players, but the emotional center stays with Kaz and the terrible pressure of being claimed by people she no longer trusts.

Kaz is tough, but toughness is not the same as freedom.

In The Mourner, the story widens. Kaz is living under witness protection in Glasgow, trying to disappear into student life and keep her head down. Then the death of Helen Warner, once her lawyer and lover, drags her back into danger. Nicci, badly damaged by her own losses, becomes an uneasy ally as the two women dig into a case that reaches into power, corruption, and the failures on both sides of the law.

By the time The Killer arrives, Wilkins has pushed the series beyond straight gangland crime and into something broader and meaner. Kaz is on the run, enemies are closing in, and survival means fighting back. Nicci is now working security for the very rich, which lets the story move between the backstreets of organised crime and the polished surfaces of elite London. Money, revenge, political influence, and brute force all mix together.

In these books, the law is never as clean as it looks.

That is a big part of the appeal. The series has the pace of a thriller, but it is just as interested in coercion, trauma, family abuse, female loyalty, and the strange bonds people form when they are trying to stay alive. Kaz is not a detective and not a classic hero either. She is compromised, resilient, and often trapped between bad options, which makes her compelling to follow.

If you like dark crime fiction with strong women, real emotional stakes, and a sharp sense that respectability and criminality are often closer than they appear, Kaz Phelps is well worth your time.