The Nethergrim series does not have a new book coming out soon. The latest book, The Wyrdknot (Book 3), was published in September 2017.
The first book in the Nethergrim series, The Nethergrim, was published in April 2014.
The Nethergrim series primarily falls into the Action Adventure genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.