There are 1 book by Colm O'Callaghan on BookOrb. A strong starting point is Irish Traction (2019). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Colm O'Callaghan written?
BookOrb lists 1 book by Colm O'Callaghan.
Where should I start with Colm O'Callaghan?
A good starting point is Irish Traction (2019).
What is the Colm O'Callaghan books in order list?
In publication order: 1. Irish Traction (2019).