About the book

When police officer Peter Fisher is called to the scene of a supposed prank call, irritation turns to fear when he realises that there is no joke. A young boy says he witnessed a little girl being bundled into the boot of a car, and Peter believes him.

DI Cormac Reilly and Peter search for answers, but obstacles are put in their way by their own superior officers. Frustrated and severely short-staffed, Peter and Cormac are pushed to breaking point, resulting in a fatal mistake.

Cormac is suspended from duty and Peter is banished to a tiny town on the west coast of Ireland, where he’s tasked with doing the paperwork in a murder investigation that’s supposed to have been resolved. But something isn’t adding up, including the mysterious appearance of a young woman and her nine-year-old daughter, who hasn’t spoken a word in months . . .

ISBN: 9781460756805
ISBN 10: 1460756800
Pages: 400
On Sale: 7/7/2021
Format: eBook
Author’s  Note

Author’s Note

When I wrote The Good Turn I thought it might be the last of the Cormac Reilly books (though I wasn’t quite brave enough to confess that at the time!). Before the events of The Ruin, Cormac Reilly was the ultimate insider but over the course of the books he was forced to see the ugly side of the police force. He had to decide what kind of man he was going to be, and figure out if he could find a way to be a good cop in the midst of it all. The Good Turn really brought that into the foreground, and I think I felt, by the end of the book, that I’d found a natural place to bring the stories to a close. And I did leave the books for a while after that, I wrote two stand-alone novels before Cormac decided to let me know that he had more story to tell.

— Dervla

Awards & critical praise

‘With her third novel Dervla McTiernan confirms she’s a born storyteller.’

Val McDermid

‘Intelligent and fast-paced … We can’t wait [for the next case]’

Wall Street Journal

‘A truly fine police procedural that should see the author rocket from star to superstar.’

Irish Independent

‘With her third novel Dervla McTiernan confirms she’s a born storyteller.’

Val McDermid

‘Intelligent and fast-paced … We can’t wait [for the next case]’

Wall Street Journal

‘A truly fine police procedural that should see the author rocket from star to superstar.’

Irish Independent

‘With her third novel Dervla McTiernan confirms she’s a born storyteller.’

Val McDermid

‘Intelligent and fast-paced … We can’t wait [for the next case]’

Wall Street Journal

‘A truly fine police procedural that should see the author rocket from star to superstar.’

Irish Independent

For book clubs, media, and curious readers — here’s a resource you might find useful.

You’ll find a printable discussion guide for this book.

Other Books in the series

The Ruin

Book 1

The Ruin

Galway 1993: Young Garda Cormac Reilly is called to a scene he will never forget. Two silent, neglected children - fifteen-year-old Maude and five-year-old Jack - are waiting for him at a crumbling country house. Their mother lies dead upstairs.

The Scholar

Book 2

The Scholar

When Detective Cormac Reilly's girlfriend Emma stumbles across the victim of a hit and run early one morning, he is first on the scene of a murder that would never have been assigned to him.

The Unquiet Grave

Book 4

The Unquiet Grave

For years the boglands of Northern Europe have given up bodies that are thousands of years old, uncannily preserved. Bodies with strange injuries that suggest ritual torture and human sacrifice.

Looking for more?

If you’ve finished the Cormac Reilly novels or want to explore more, take a look at the standalone thrillers or the Audio Novellas.