There are 1 book by William M., Jr. O'Brien on BookOrb. A strong starting point is Stehle's Door (2004). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has William M., Jr. O'Brien written?
BookOrb lists 1 book by William M., Jr. O'Brien.
Where should I start with William M., Jr. O'Brien?
A good starting point is Stehle's Door (2004).
What is the William M., Jr. O'Brien books in order list?
In publication order: 1. Stehle's Door (2004).