Always and the Pure-Blood Prince

Harry takes to writing about Slytherin's prince, but after losing the piece of parchment he has a horrifying idea of whose hands it might have fallen into. After having reopened last week, Hogwarts is already showing signs of new secretes to unearth, from Hippogriffs to Animagus's, and how does Malfoy keep vanishing? [Drarry/ HarryXDraco/ DracoXHarry/] After the Deathly Hollows.