No books can beat Prisoner of Azkaban, even if it's writeen by Rowling herself. This book is the peak. This book is the golden boy from the Wizarding World. The moment when Harry learn the truth about his parents and when Harry met Sirius with Lupin and Snape also Peter. The moment when we learn that Harry isn't alone, his Godfather is still alive and trapped from the false accusation. This book also giving us the best quiditch match ever. McGonagall who were triggered on the quiditch match and the final between Gryffindor and Slytherin. Simply, Prisoner of Azkaban is a perfection.