The Demon King's Gambit (2nd Book of The Demon Monarchy Trilogy)

It was fourteen years since he had given up his humanity to Demon Queen Delyliah as becoming her mate in order to save his kingdom from Bastian, his his children got older. King Cyrus hired tutors, and nanny watched his children when he was doing King's doing. But he played with them when his time told them stories. He takes them to the library or hunting. He taught them to swordfighting and archery to defend themselves.

Years have passed, and the villagers are horrified by the King's children after Bastian has sent demon hunters in the city by spreading lies about Cyrus and his children to take over the world. The king slain the hunters when they tried to harm his children. He told Haggard to watch the king for him. He has flee with his children into the swamplands to settle in the wilderness to make sure no one never bother them again. Abigailela decided to flee with them....He is willing to do anything if he can to get his kingdom if he's willing to unleash his inner darkness upon those who want to harm his beloved people.