The Reign of Shadows series does not have a new book coming out soon. The latest book, Do Unto Others (Book 3), was published in July 2019.
The first book in the Reign of Shadows series, Judge Not, was published in July 2019.
The Reign of Shadows series primarily falls into the Dark Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.