There are 1 book by Seamus O'Caellaigh on BookOrb. A strong starting point is Herbs of Tymberhavene (2016). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Seamus O'Caellaigh written?
BookOrb lists 1 book by Seamus O'Caellaigh.
Where should I start with Seamus O'Caellaigh?
A good starting point is Herbs of Tymberhavene (2016).
What is the Seamus O'Caellaigh books in order list?
In publication order: 1. Herbs of Tymberhavene (2016).