The Fiann Trilogy series does not have a new book coming out soon. The latest book, Gryffynhall (Book 1), was published in September 2020.
The first book in The Fiann Trilogy series, Gryffynhall, was published in September 2020.
The Fiann Trilogy series primarily falls into the Action Adventure genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.