There are 1 book by Ronan O'Callaghan on BookOrb. A strong starting point is Walzer, Just War and Iraq (2015). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Ronan O'Callaghan written?
BookOrb lists 1 book by Ronan O'Callaghan.
Where should I start with Ronan O'Callaghan?
A good starting point is Walzer, Just War and Iraq (2015).
What is the Ronan O'Callaghan books in order list?
In publication order: 1. Walzer, Just War and Iraq (2015).