There are 1 book by Sarah O'Brien on BookOrb. A strong starting point is WhackAZombie (2008). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Sarah O'Brien written?
BookOrb lists 1 book by Sarah O'Brien.
Where should I start with Sarah O'Brien?
A good starting point is WhackAZombie (2008).
What is the Sarah O'Brien books in order list?
In publication order: 1. WhackAZombie (2008).