There are 1 book by Mark C. O'Brien on BookOrb. A strong starting point is Have Pool Cue Will Travel (2020). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Mark C. O'Brien written?
BookOrb lists 1 book by Mark C. O'Brien.
Where should I start with Mark C. O'Brien?
A good starting point is Have Pool Cue Will Travel (2020).
What is the Mark C. O'Brien books in order list?
In publication order: 1. Have Pool Cue Will Travel (2020).