There are 1 book by Bryn O'Callaghan on BookOrb. A strong starting point is An illustrated history of the USA (2000). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Bryn O'Callaghan written?
BookOrb lists 1 book by Bryn O'Callaghan.
Where should I start with Bryn O'Callaghan?
A good starting point is An illustrated history of the USA (2000).
What is the Bryn O'Callaghan books in order list?
In publication order: 1. An illustrated history of the USA (2000).