There are 1 book by Romaeus O'Brien on BookOrb. A strong starting point is The Provincial Superior in Religious Orders of Men (2014). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Romaeus O'Brien written?
BookOrb lists 1 book by Romaeus O'Brien.
Where should I start with Romaeus O'Brien?
A good starting point is The Provincial Superior in Religious Orders of Men (2014).
What is the Romaeus O'Brien books in order list?
In publication order: 1. The Provincial Superior in Religious Orders of Men (2014).