Circle of Assassins Books in Order

This is one of Ann Gimpel's darker urban fantasy series, and it knows exactly what kind of company it keeps. The core idea is simple and sharp: supernatural assassins move through a modern world where magic hides in plain sight, contracts end in blood, and bond animals are not decorative extras. They are part of the danger.

Each book shifts the spotlight. Shira, Quinn, Rhiana, Kylian, and later Grigori all bring a different angle to the same lethal circle. Some are colder than others. Some are older, stranger, or more openly power hungry. What links them is not sweetness or heroism. It is competence, appetite, and the feeling that violence has long since become ordinary.

That rotating cast is a big part of the appeal. Shira is blunt about what she does. Quinn carries wizard magic and the temperament of someone who never fit anywhere for long. Rhiana feels ancient and nearly impossible to kill. Kylian pushes at the edges of obsession, especially where power is involved. Even before the plot widens, the voices make the series feel varied without losing its dark center.

The bond animals matter too. They deepen the world, sharpen instincts, and add a feral edge to relationships that might otherwise be all calculation. These characters may work alone, but they are never entirely alone.

Expect action, body counts, and a lot of morally gray thinking. The books are not interested in polishing these killers into saints. Instead, they lean into what happens when predators get caught in loyalties, rivalries, and magical power struggles they cannot simply stab their way out of. If you like urban fantasy with antiheroes, hard edges, and a little bite in every chapter, this series delivers that very well.