Original: Fifth and sixth books In the fifth book, Harry Potter and the Order of the Phoenix, the Ministry of Magic has been waging a smear campaign against Harry and Dumbledore, disputing their claims that Voldemort has returned.
Simplified: Fifth and sixth book In the fifth book, Harry Potter and the Order of the Phoenix, the Ministry of Magic has been waging a smear campaign against Harry and Dumbledore, disputing their claims that Voldemort has returned.