Harry Potter and the Order of the Phoenix by J.K. Rowling — book slip

In "Harry Potter and the Order of the Phoenix," Harry returns to Hogwarts for his fifth year, only to find the wizarding world in turmoil. The Ministry of Magic refuses to acknowledge the return of Voldemort, and a new, oppressive Defense Against the Dark Arts teacher, Dolores Umbridge, takes control at Hogwarts. As Harry struggles with the weight of his destiny, he forms Dumbledore's Army with his friends to resist the authoritarian regime and prepare for the battles ahead. Themes of power, institutional corruption, and adolescent rebellion are central as Harry learns about sacrifice and the strength of friendship.

Fifth in the Harry Potter series, this installment marks a darker and more complex turn in the saga.