To Find What is Lost

Find is the story of a certain son of Hades, dragged out of his almost perfect life to attend a crazy magic school in Britain.
Nico was finally living the life when his father took the liberty of informing him that he would have to travel to England and mingle in the world of Witches and Wizards that Hecate has lost control of, in order to find out more about and do everything in his power to stop the creation of a spell that could lead to the discovery of the gods. At Hogwarts, Nico is met with a storm of conflicting emotions, difficulties and an annoyingly mysterious Slytherin who keeps messing with everything Nico thought he knew...

Very obvious but essential point: I do not own any of HP or PJO, all characters belong to Rick Riordan and Dobby (writing is my own tho)