Hogwarts is known for having its ghosts, like Sir Nicholas, the Bloody Baron, and Peeves. What happens when Hades, the god of the underworld, finds out ghosts have escaped the underworld to go to a wizarding school in Europe. How will Albus Potter, Rose Weasley, and Scorpius Malfoy react to three strangers who want to take the ghosts away? All characters and settings belong to J.K. Rowling and Rick Riordan.

When Percy, Annabeth, Nico, and Thalia get assigned a quest to protect Harry Potter, they never expected it to be back in time and in a whole different world: a world of magic. In Hogwarts, no one suspects a thing. But what happens when three young wizards find out the truth? Fandom time period: Takes place after the Blood of Olympus but during The Sorcerers Stone. DISCLAIMER: I own NOTHING. Characters, plot, ideas, and lines ALL belong to the wonderful authors Rick Riordan and Joanne Rowling. [Highest rank: 304 in fanfiction]

The Giant war is over and Percy Jackson is spent. Finally there's a chance he can be with Annabeth for a while and he eagerly awaits the summer they have planned together. But when Hecate shows up and sends Percy on a new quest, it could be the by far stupidest thing he has ever done. He must be the new teacher at Hogwarts. Harry Potter has been attacked by the Ministry and Dementors. If that wasn't enough he now has a new teacher. But he is like, a 17 year-old kid. Who looks a lot like him. It's Harry's 5th year and he is now a nutter to the wizarding world. So when he sees the kid show up at Number 12 Grimmauld Place, he starts thinking he might actually be mental. The new kid turns out to be a teacher. The teacher of DADA. But Umbridge is still there- as the High Inquisitor. It seems she watches the new teacher-Professor Jackson- a lot more than the others. Something is off about him. And the Golden Trio always tries to find out what.

"He saw a almost identical boy a few feet away from him. The only difference was that he had a small scar shaped like a lightning bolt on his forehead a glasses. Percy walked closer to him, realizing that he noticed him too" If you're a Potterhead AND a PJO/HOO fangirl/boy then this book is for you! Read to find out what happens next.... The character Percy Jackson and the other demigods are owned by Rick Riordan and The character Harry Potter and the other wizards are owned by J.K Rowling, thus other characters belong to the author of this book/me! The dragon belongs to the amazing artist viria and I only did a little change to Percy's mouth to make him smile.