Dark times have come to Hogwarts. After the Dementors' attack on his cousin Dudley, Harry Potter knows that Voldemort will stop at nothing to find him. There are many who deny the Dark Lord's return, but Harry is not alone: a secret order gathers at Grimmauld Place to fight against the Dark forces. Harry must allow Professor Snape to teach him how to protect himself from Voldemort's savage assaults on his mind. But they are growing stronger by the day and Harry is running out of time … J.K. Rowling's internationally bestselling Harry Potter books continue to captivate new generations of readers. Harry's fifth adventure alongside his friends, Ron and Hermione, invites you to explore even more of the wizarding world; from the sickly-sweet, kitten-clad walls of Professor Umbridge's office to the unplottable recesses of the Room of Requirement. This gorgeous paperback edition features a spectacular cover by award-winning artist Jonny Duddle, plus refreshed bonus material, including ten essential spells for any witch or wizard learning the art of self-defence. Perfect for anyone who's ready to lose themselves in the biggest children's books of all time.