I only own the plot and a few characters. J.K. Rowling owns Harry Potter and Rick Riordan owns Percy Jackson and Heroes of Olympus. Takes place after the 2nd Titan War. Heroes of Olympus doesn't happen but some of the characters appear. Myths and Magic. There is a new Great Prophecy. It revolves around new demigods. And you can't forget the wizards. I'm pretty sure Chaos will ensue.