Harry Potter and the Order of the Pheonix by J.K. Rowlingf
Harry Potter and the Order of the Pheonix by J.K. Rowling -- 896 pages
The fifth book in the Harry Potter series. Voldemort has returned and is gaining strength and followers, and the Order of the Pheonix is ready to stop him.
During Harry's fifth year at Hogwarts, dark magic is all around, and every day it is penetrating further into the Ministry of Magic, and Hogwarts itself.