Hermione Granger is crucial to Harry and Ron in their successful mission to solve the mystery of the Chamber of Secrets. Hermione is revived after Harry kills the basilisk, but she is distraught to learn that all end-of-year exams have been cancelled as a school treat. Hermione buys a cat named Crookshanks, who takes to chasing Ron's pet rat, Scabbers. Before the start of term, Professor McGonagall secretly gives Hermione a Time-Turner, a device which enables her to go back in time and handle her heavy class schedule, though this is not revealed until the penultimate chapter. Much tension comes into play
Harry Potter and the Order of the Phoenix Fire" was published on 8 July 2000 simultaneously by Bloomsbury and Scholastic. "Harry Potter and the Order of the Phoenix" is the longest book from the series, yet the second shortest film at 2 hours and 18 minutes. After the publishing of "Order of the Phoenix", the sixth book of the series, "Harry Potter and the Half-Blood Prince", was published on 16 July 2005, and sold 9 million copies in the first 24 hours of its worldwide release. The seventh and final novel, "Harry Potter and the Deathly Hallows", was published 21 July 2007. The book sold 11 million copies