There are 1 book by Gerald O'Callaghan on BookOrb. A strong starting point is Azuwur, MARG 3-84 (1985). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Gerald O'Callaghan written?
BookOrb lists 1 book by Gerald O'Callaghan.
Where should I start with Gerald O'Callaghan?
A good starting point is Azuwur, MARG 3-84 (1985).
What is the Gerald O'Callaghan books in order list?
In publication order: 1. Azuwur, MARG 3-84 (1985).