Disclaimer: I do not own the Harry Potter books and characters and the Percy Jackson books and characters. I wish I did, so I wouldn't have to write these disclaimers.
Prologue
Leo's POV
We had finished the capture the flag game when Chiron suddenly announced, "Leo, Percy, Calypso, Annabeth, Piper, Will, Jason, and Nico, have you heard of Harry Potter?"
"I have," Annabeth said. Of course she had.
"Well," Chiron said, "For those who don't know about it, it is an unfinished book series. There are three books in it. I want you to read those books in the next two weeks. When you need them, buy it from the camp store.
Annabeth ran to the camp store immediately.
"Well," I said to Jason, "I wonder why we have to do this."