There are 1 book by Dan O'Cleirigh on BookOrb. A strong starting point is It'll Be Quick (2015). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Dan O'Cleirigh written?
BookOrb lists 1 book by Dan O'Cleirigh.
Where should I start with Dan O'Cleirigh?
A good starting point is It'll Be Quick (2015).
What is the Dan O'Cleirigh books in order list?
In publication order: 1. It'll Be Quick (2015).