11-year-old David Williams finds out he is a demigod and a wizard on the last day of school. He travels to Camp Half-Blood and gets sent on a perilous quest with his half-brother Jason Grace. Along the way, he meets many new friends and together they defeat the sorceress Medea and the dark wizard Voldemort. Disclaimer: This story is only fanfiction about Harry Potter and Percy Jackson. The Wizarding World is created by J.K Rowling and the Percy Jackson universe is created by Rick Riordan.