There are 1 book by Greg O'Callaghan on BookOrb. A strong starting point is Eighty Quick Years (2023). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Greg O'Callaghan written?
BookOrb lists 1 book by Greg O'Callaghan.
Where should I start with Greg O'Callaghan?
A good starting point is Eighty Quick Years (2023).
What is the Greg O'Callaghan books in order list?
In publication order: 1. Eighty Quick Years (2023).