Harry Potter and The Half Blood Prince review by Karen J. is a articulate and well thought-out response. But at times she went a little to far by describing it as "The weakest installment of the series." You still have to respect the fact that this director is being paid to make movies and a lot of people thought that this was a good movie and did like it. When Karen said most main characters were left out and had small parts you have to have an open mind for new characters and different roles. I wonder if Karen liked any of the first books because after every year at Hogwarts there is a new defence against the dark arts teacher in which there is a new character. To get this book you have to follow it inventively and with interest and even though it didn't make your high expectations it met very many others.