There are 2 books in the Secrets of Nine Irish Sons series.
The Secrets of Nine Irish Sons series does not have a new book coming out soon. The latest book, The Forces of Stones (Book 3), was published in August 2011.
The first book in the Secrets of Nine Irish Sons series, The Beginning, was published in June 2009.
The Secrets of Nine Irish Sons series primarily falls into the Historical Mystery genre.