HARRY and his friends are back, and that's reason to celebrate! If you're one of the millions of Potter fans who have just read the book Harry Potter and the Half-Blood Prince, here's your chance to put all your knowledge of the wizarding (有魔力的) world to good use. Host a Potter party that's worthy of an end-of-the-year feast (宴会) at Hogwarts. Invite friends who share your Potter passion (喜爱), and create games, snacks and costumes that will get your guests excited for the upcoming book and movie.