I recommend "Demon Slayer Storm" to you. This is a fantasy novel. The main character started off as a slave, but later on, because he couldn't bear to see the human race being humiliated, he vowed to eliminate the demons and protect the Dao. He returned a home to the human race and brought peace and prosperity to the continent. He became a demon slaying hero. The novel also had a battle with the demons. I hope you like my recommendation. Muah ~