There are 1 book by Eirian O'Brien on BookOrb. A strong starting point is World of Gabriel Black (2017). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Eirian O'Brien written?
BookOrb lists 1 book by Eirian O'Brien.
Where should I start with Eirian O'Brien?
A good starting point is World of Gabriel Black (2017).
What is the Eirian O'Brien books in order list?
In publication order: 1. World of Gabriel Black (2017).