A minority reports

Found four people who disliked Potter and the Half-Blood Prince. "Rubbish book" said one friend angrily. "It could have been edited down to half its size. It had absolutely no moments, nothing wonderous, nothing that lit up your imagination," said another.

Half-Blood Prince seems to be the book in which J K Rowling tied up all the threads she had unravelled in previous books. Problem is that now it's full of knots and that makes it a very bumpy ride.