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 Prisoner of Azkaban will meet again. "Harry Potter and the Prisoner of Azkaban" is the third book in the "Harry Potter" series. The first, "Harry Potter and the Philosopher's Stone" ("Harry Potter and the Sorcerer's Stone" in the US), was published by Bloomsbury on 26 June 1997 and the second, "Harry Potter and the Chamber of Secrets", was published on 2 July 1998. Rowling started to write the "Prisoner of Azkaban" the day after she finished "The Chamber of Secrets". Rowling's favourite aspect of this book was introducing the character Remus Lupin, Rowling additionally said in 2004 that "Prisoner of Azkaban" was "the