Harry Potter and Percy Jackson Crossover

*BLOOD OF OLYMPUS SPOILERS*

After defeating the Earth itself, Percy Jackson discovers a whole new world- one filled with magic, excitement, and extreme danger. So nothing Percy wasn't used to. But this new world- although it's usually dangerous, at this time, it's scarier than ever. Voldemort, a powerful and dark wizard is returning- and he's not back to learn some magic tricks. With help from his old and new friends, they work together to defeat Voldemort once and for all.