Annabeth and Percy were not expecting to be assigned a quest while packing for college in new Rome Let alone a quest that involved attending a magic school In a secret society Of witches and wizards for four years. But I guess unexpected shit happens sometimes. Protecting Harry Potter is an important task after all. I won't kill off any characters. Who didn't die in canon, The timeline is very weird since i don't know how much time difference there is between the two.