It's Harry Potter's sixth year at Hogwarts, and aside from the rising power of Voldemort, the mysterious potion book that once belonged to the Half-Blood Prince, the shady doings of Draco Malfoy, private lessons from Dumbledore and the occasional Death Eater, our hero has to deal with having a crush on his best friend Ron Weasley's sister, Ginny. It's a wonder he manages to keep his grades up and still have time to be captain of the quidditch team.