There are 1 book by Jim O'Callaghan on BookOrb. A strong starting point is The Irish exploration sector (1992). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Jim O'Callaghan written?
BookOrb lists 1 book by Jim O'Callaghan.
Where should I start with Jim O'Callaghan?
A good starting point is The Irish exploration sector (1992).
What is the Jim O'Callaghan books in order list?
In publication order: 1. The Irish exploration sector (1992).