Greek_Witch
(This is not going to be big on quests. Also, this is my first book, so please, don't blame me if I get some things wrong.)
WARNING! IF YOU HAVE NOT READ THE BURNING MAZE AND YOU DON'T LIKE SPOILERS, DO NOT READ!
Percy, Annabeth, Piper, Nico, Hazel, Frank, and Leo are going to Hogwarts! (Also, Nico resurrected Jason as a 'house ghost' at Hogwarts) Chiron has told them that a colleague of his is calling in a favor. They are going to be 'guinea pigs' of what may be a line of exchange students between Hogwarts and Camp Half Blood.
This takes place after Harry, Ron, and Hermione leave Hogwarts, so basically, this is 10-11 years after book 7.