As the dark forces of the Dark Lord gather, a spirit of gloom and fear spreads across the land. Harry Potter nervously waits in his bedroom at the Dursleys for the arrival of Professor Dumbledore. One of the last times he saw the headmaster was during a fierce duel with Voldemort at the Ministry of Magic. Why is the professor coming to him now? What is so urgent that it cannot wait until Harry returns to Hogwarts? In his sixth year, Harry will uncover the secret of the Half-Blood Prince while Professor Dumbledore prepares him to face his destiny.