Harry Potter and the Demigods of Olympus

It's a year after the war with Voldemort. People are mourning and perhaps the worst of them all are Harry Potter, Hermione Granger, and Ron Weasley. When McGonagall states that everyone must repeat the previous year of school, the three heroes find themselves on the Hogwarts Express back to school. But as everyone knows by now, Hogwarts is never peaceful and uneventful, even with Voldemort gone.

It's a year after the battle at New York with Kronos and his army. The Demigods are mourning, but are training harder than ever and taking on new quests. But when one new girl comes to the Camp, and Nico has a disturbing vision concerning another war, the Demigods find themselves engaged in another battle with Kronos and his new target; the wizards of Hogwarts.