Mr. Jackson? (Demigods at Hogwarts) [Completed]

Percy Jackson expected life to calm down after the Giant War. And things did.... for a while. He searched the country for demigods, and tried to live the most normal life a demigod could. But, as usual the gods had other plans. When Hecate comes down with an offer to go to Hogwarts, he accepts it (after making a few c...