: After a Dementor attack in the Muggle world, Harry is whisked away to 12 Grimmauld Place , the headquarters of the Order of the Phoenix —a secret group led by Albus Dumbledore to fight the returned Lord Voldemort.
: Lured by a false vision of his godfather Sirius Black being tortured, Harry leads friends to the Department of Mysteries . A massive battle ensues between the DA, Death Eaters, and the Order, resulting in the tragic death of Sirius Black and the public exposure of Voldemort's return. Key Themes
: Because Umbridge refuses to teach practical magic, Harry secretly forms his own group, Dumbledore’s Army , to teach his peers defensive spells.