Percy had just gotten back home after his trip to Greece to fight Gaea, and was looking forward to a few months of rest before setting off to New Rome for college with Annabeth, when his mom dropped a bombshell. "Percy, you remember when I told you that I had a sister, right?" "Yup. You told me that you hadn't seen her for years and she was most likely dead......" he said, curious. "Well, she's alive, and she married a man named Henry Granger, and they want to meet us for Christmas." This is a Percy Jackson and Harry Potter crossover. I don't own any of the characters, they belong to JK Rowling and Rick Riordan. The story is mine, though.