Anna Potter and the order of the phoenix

[Book 5]
After returning to Hogwarts to begin her fifth year at Hogwarts, Anna Potter discovers that much of the wizarding world, including the Ministry of Magic, is in denial about Lord Voldemort's return. The Order of the Phoenix, a group sworn against Voldemort, is using its vast array of wizards and witches magical abilities to combat Voldemort. Cornelius Fudge, Minister for Magic, suspects that Dumbledore is using these claims of The Dark Lord's return as a means to over-throw Fudge as Minister. In retaliation, a new Defense Against the Dark Arts teacher is appointed by the Ministry in order to keep an eye on Hogwarts. This new teacher, Professor Dolores Umbridge, implies strict new teachings and rules, forcing a group of students, under the tutelage of Anna, to form a club, by the name of "Dumbledore's Army".