Harry Potter and the Half-Blood Prince is the sixth novel in J. K. Rowling's Harry Potterseries. Set during Harry Potter's sixth year at Hogwarts, Lord Voldemort is definitely back, and with a vengeance. Harry finds his world is yet again changing: wizards and witches and Muggles alike are dying, despite the efforts of the Ministry of Magic and the Order of the Phoenix. Despite the danger, Harry and his best friends, Ron and Hermione, return to the familiar life of Hogwarts for their sixth year. They find yet another Defence Against the Dark Arts teacher: Professor Snape. They begin their N.E.W.T. classes in preparation for life after Hogwarts, and Harry gets some much needed Potions help from the mysterious Half-Blood Prince. Quidditch is as popular as ever, Harry is nominated as Gryffindor Quidditch Captain.