Harry Potter und der Orden des Phönix

J.K. Rowling

Harry Potter spends a tense summer with the Dursleys, feeling isolated. One evening, he and Dudley are attacked by Dementors, forcing Harry to use magic to save them. This leads to his temporary expulsion from Hogwarts. Rescued by the Order of the Phoenix, he is taken to their headquarters, where he reunites with friends and learns of their mission to fight Voldemort. Despite the Ministry of Magic's denial about Voldemort's return, Harry and his friends form "Dumbledore's Army" to learn practical defense. Harry's disturbing visions of Voldemort's plans lead to Dumbledore ordering Occlumency lessons from Snape, which is challenging. Harry's visions culminate in a false vision of Sirius in danger, leading to a battle at the Ministry in which Sirius is killed and a prophecy about Harry and Voldemort is revealed. Dumbledore explains that Harry must ultimately defeat Voldemort. The year ends with Harry grieving but determined to fight Voldemort, knowing that he is not alone.