There are 1 book by Denis O'Callaghan on BookOrb. A strong starting point is Sacraments (1964). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Denis O'Callaghan written?
BookOrb lists 1 book by Denis O'Callaghan.
Where should I start with Denis O'Callaghan?
A good starting point is Sacraments (1964).
What is the Denis O'Callaghan books in order list?
In publication order: 1. Sacraments (1964).