There are 3 books in The Castes and the OutCastes series.
The Castes and the OutCastes series does not have a new book coming out soon. The latest book, A Warrior's Penance (Book 3), was published in June 2016.
The first book in The Castes and the OutCastes series, A Warrior's Path, was published in January 2014.
The Castes and the OutCastes series primarily falls into the Epic Fantasy and Heroic Fantasy / Sword & Sorcery genres.