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