The God-Slaying Demon King 02 by Ezogingitune, Pig3rd; Teddy

The strongest demon king in history returns from the dead and embarks on a grand adventure to find the god of all demons...and kill him! Hiram, the strongest demon king in history and ruler over all of demonkind, refused to obey the demon god's demand for sacrifices. A fierce battle ensued, which ended with Hiram losing his life. Five centuries later, Hiram successfully reincarnates himself as a young human with his magical powers and combat ability from his previous incarnation. He sets out on a journey to locate his adopted daughter, Philffy, as well as the Demon God, who is hiding somewhere in the world. After rescuing Lumiere, a royal elven princess, Hiram agrees to mentor her in the arts of magic. But soon, he gradually finds himself more and more entangled in a dark conspiracy brewing in the Kingdom of Orteville...

Teddy Slater is the author of over 100 children's books, including Smooch Your Pooch, The ABC Sing-Along, Llamas in Pajamas, The Wrong-Way Rabbit and N-O Spells No. Her latest book is Dottie and the Dog Show. Teddy and her husband, Fred, live on a farm in upstate NY with their good dog, Barkly.