I love Harry Potter, and I have read all of the books multiple times. I was very excited for the Half Blood Prince to come out because it is my favorite book in the series. I was somewhat disappointed though on their emphasis of events, and I felt like those who haven't read the books wouldn't understand some of the key components (the horcruxes, the half blood prince, etc.) because they didn't provide enough emphasis on explaining them. Still a fan though, and I will continue to see the movies.