Definitely 5 stars. Things got real in this book. The kids are older and the issues have more depth. We get more adults involved and deeper motivations. And some awesome quidditch games. Plus the danger in this one is more real and less fantastical. The mystery of Sirius Black was very well done. The ending definitely is a rollover coaster of emotions. This is my 2nd time reading this and I did the audio book this time. No regrets on that.