HarryPotter and the prisoner of azakaban was written by J.K.Rowling. I really enjoyed this book.The author J.K.Rowling has written complicated words in this book.This book is about Harry Potter thrid year at Hogwarts school of witchcraft and wizardly. The Story line is about a guy named Sirius black who escapes Azkaban. Harry is facing the dementors that suck the happy memorises away from you. Harry potter has to defet the dark lord voldemort. I rate this book 100\100. J.K. Rowling has made these harry potter books really well when she based lord voldemort on her dad.