There are 1 book by Warren S. O'Brien on BookOrb. A strong starting point is Adventures along the Cumberland (1964). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Warren S. O'Brien written?
BookOrb lists 1 book by Warren S. O'Brien.
Where should I start with Warren S. O'Brien?
A good starting point is Adventures along the Cumberland (1964).
What is the Warren S. O'Brien books in order list?
In publication order: 1. Adventures along the Cumberland (1964).