There are 1 book by Harriet O'Brien on BookOrb. A strong starting point is Queen Emma and the Vikings (2005). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has Harriet O'Brien written?
BookOrb lists 1 book by Harriet O'Brien.
Where should I start with Harriet O'Brien?
A good starting point is Queen Emma and the Vikings (2005).
What is the Harriet O'Brien books in order list?
In publication order: 1. Queen Emma and the Vikings (2005).