There are 4 books in The Horizon Chronicles series.
The Horizon Chronicles series does not have a new book coming out soon. The latest book, The Lord of Darkness (Book 4), was published in February 2018.
The first book in The Horizon Chronicles series, The Soul Thief, was published in February 2017.
The Horizon Chronicles series primarily falls into the Action Adventure and Fantasy genres. This young adult series was written for ages 12-17, but can be enjoyed by adults too.