There are 1 book by Joan O'Callaghan on BookOrb. A strong starting point is Amazing Days (2016). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Joan O'Callaghan written?
BookOrb lists 1 book by Joan O'Callaghan.
Where should I start with Joan O'Callaghan?
A good starting point is Amazing Days (2016).
What is the Joan O'Callaghan books in order list?
In publication order: 1. Amazing Days (2016).