There are 1 book by Phyllis O'Callaghan on BookOrb. A strong starting point is A Clashing of Symbols (1988). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Phyllis O'Callaghan written?
BookOrb lists 1 book by Phyllis O'Callaghan.
Where should I start with Phyllis O'Callaghan?
A good starting point is A Clashing of Symbols (1988).
What is the Phyllis O'Callaghan books in order list?
In publication order: 1. A Clashing of Symbols (1988).