The Fianna Trilogy series does not have a new book coming out soon. The latest book, The Veil (Book 3), was published in August 2015.
The first book in The Fianna Trilogy series, The Shadows, was published in June 2014.
The Fianna Trilogy series primarily falls into the Historical and Fantasy genres. This young adult series was written for ages 12-17, but can be enjoyed by adults too.