Harry Potter and the Half-Blood Prince
Now, not only the world of wizards, but also the world of muggles feels the ever-increasing power of Voldemort, and Hogwarts can no longer be called a safe haven, as it was before. Harry suspects that some danger lies in the castle itself, but Dumbledore is more focused on preparing him for the final battle, which, as he knows, is just around the corner. Together they are trying to unravel the secret of Voldemort’s immortality, and for this Dumbledore invites his old friend and colleague, Professor Horace Slughorn, who loves to organize parties for the elite and is proud of his extensive connections in higher circles. But this bonvivan does not even suspect that it is from him that Dumbledore hopes to get the most important information about the crucifixes.