I really enjoyed Harry Potter and the Half-Blood Prince (#6). I liked how it filled in all the blanks on most of the characters, specifically Lord Voldemort. It was definitely one of my top 3 from the series so far (I have yet to read #7). Though it was lengthy, I thought Rowling did a good job of keeping my focus and being detailed throughout. I didn't like how it skipped around through the chapters very much, flopping between characters so rapidly, but that was a minor flaw in my opinion.
Rating 4 out of 5