There are 1 book by Peter Paul O'Callaghan on BookOrb. A strong starting point is In Two Countries Where They Turn Back Time (2019). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Peter Paul O'Callaghan written?
BookOrb lists 1 book by Peter Paul O'Callaghan.
Where should I start with Peter Paul O'Callaghan?
A good starting point is In Two Countries Where They Turn Back Time (2019).
What is the Peter Paul O'Callaghan books in order list?
In publication order: 1. In Two Countries Where They Turn Back Time (2019).