There are 3 books in the Knights of the Realm series.
The Knights of the Realm series does not have a new book coming out soon. The latest book, Hidden Knights (Book 3), was published in March 2020.
The first book in the Knights of the Realm series, Realm of Knights, was published in September 2019.
The Knights of the Realm series primarily falls into the Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.