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