There are 3 books by Charles H. O'Brien on BookOrb. A strong starting point is Ideas of Religious Toleration at the Time of Joseph Second (1969). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Charles H. O'Brien written?
BookOrb lists 3 books by Charles H. O'Brien.
Where should I start with Charles H. O'Brien?
A good starting point is Ideas of Religious Toleration at the Time of Joseph Second (1969).
What is the Charles H. O'Brien books in order list?
In publication order: 1. Ideas of Religious Toleration at the Time of Joseph II. a Study of the Enlightenment among Catholics in Austria (1969), 2. Ideas of religious toleration at the time of Joseph II (1969), 3. Ideas of Religious Toleration at the Time of Joseph Second (1969).