From the ocean's abyss: The Soldier Series Book 6
by Donald Ha
Published: June 21, 2016.
Jackal, the main character, is a former German soldier. He’s a person of misfortune, swept up in war against his will and having to change sides multiple times. Coincidentally, Jackal meets Marie-Louise, a Jewish girl who holds an enormous secret. She holds within her the evil spirit of the Blood Demon, the most powerful martial arts wielder in history.