BookBingeCormac Reilly Books in Order
The short answer
Dervla McTiernan · 4 books
- How many books?
- There are 4 books in the Cormac Reilly series, published 2018–2025.
- Is it finished?
- No — it's ongoing, but the next book doesn't have a release date yet.
- Where to start
- Start with The Ruin (2018).
About 1,600 pages — roughly 30 hours of reading
A transferred Galway detective reopens a decades-old case that implicates people close to him in small-town Irish crime.
Here is the complete Cormac Reilly reading order — all 4 books by Dervla McTiernan, in the order you should read them:
Reading order
- The RuinDetective Cormac Reilly reopens a twenty-year-old case that connects to a suspicious death he's currently investigating in Galway.2018400 pages
- The ScholarReilly investigates a hit-and-run death on a university campus that appears connected to his partner's powerful pharmaceutical-family employer.2019384 pages
- The Good TurnA young officer's split-second decision spirals into a scandal that threatens to expose corruption within the Galway police force.2020384 pages
- The Unquiet GraveReilly is drawn into a case that forces him to reckon with old failures and a threat closer to home than he expected.2025
Good news: for this series, reading order and publication order are the same — just read straight down the list.
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Get BookBingeFrequently asked questions
How many Cormac Reilly books are there?
There are 4 books in the Cormac Reilly series by Dervla McTiernan, from The Ruin (2018) to The Unquiet Grave (2025). Together they run to about 1,600 pages.
Is the Cormac Reilly series finished?
No, it's ongoing. The most recent book is The Unquiet Grave (2025), and Dervla McTiernan hasn't dated the next one yet.
What is the first Cormac Reilly book?
The Ruin (2018) is book one, at 400 pages. Detective Cormac Reilly reopens a twenty-year-old case that connects to a suspicious death he's currently investigating in Galway.
Should I read the Cormac Reilly series in publication order?
Yes. For the Cormac Reilly series, reading order and publication order are the same — The Ruin (2018) through The Unquiet Grave (2025).
How long does it take to read all Cormac Reilly books?
About 1,600 pages across 4 books — roughly 30 hours at a page a minute. The longest is The Ruin (400 pages); the shortest is The Scholar (384 pages).