Book 4 of the Kethem series is out on Amazon. Following the tradition of the first book, it follows the path of one of the minor characters in book 3, Ziwa the elf. The origins of the Great War are revealed, and the tie between the story arcs from the first three books become clear.
The paperback version is at:
https://www.amazon.com/Ohulhug-Kethem-Novel-David-Dickie/dp/1676683496
The kindle version is at:
Enjoy!