There are 1 book by Shelley O'Callaghan on BookOrb. A strong starting point is How Deep Is the Lake (2017). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Shelley O'Callaghan written?
BookOrb lists 1 book by Shelley O'Callaghan.
Where should I start with Shelley O'Callaghan?
A good starting point is How Deep Is the Lake (2017).
What is the Shelley O'Callaghan books in order list?
In publication order: 1. How Deep Is the Lake (2017).