The man he killed thirty years ago is alive. Doyle needs to know how. And then he needs to finish the job.

Sean Doyle has seen things that don't leave you. The gun battle in Ireland that took the only woman he ever loved. The man he thought he put down for good. Now that man has resurfaced — older, more dangerous, and connected to a conspiracy that threatens to unravel everything Doyle has spent his career protecting.

Doyle is back in the field. Harder, more deliberate, and paired with a partner half his age who represents everything he despises. They need to stop each other from becoming the mission before they can complete it.

Testament is Hutson doing what he does better than anyone: putting a man shaped entirely by violence into a situation where violence alone won't be enough. The ending will force a choice that has no clean answer.

Already a fan of the Doyle series? This is essential. New to Doyle? Start here and work backwards.

The man he killed thirty years ago is alive. Doyle needs to know how. And then he needs to finish the job.

Sean Doyle has seen things that don't leave you. The gun battle in Ireland that took the only woman he ever loved. The man he thought he put down for good. Now that man has resurfaced — older, more dangerous, and connected to a conspiracy that threatens to unravel everything Doyle has spent his career protecting.

Doyle is back in the field. Harder, more deliberate, and paired with a partner half his age who represents everything he despises. They need to stop each other from becoming the mission before they can complete it.

Testament is Hutson doing what he does better than anyone: putting a man shaped entirely by violence into a situation where violence alone won't be enough. The ending will force a choice that has no clean answer.

Already a fan of the Doyle series? This is essential. New to Doyle? Start here and work backwards.