Harry Potter and the Half-Blood Prince is the sixth novel in J. K. Rowling's Harry Potter series. Set during Harry Potter's 6th year at Hogwarts, Voldemort is definitely back and with a vengeance. Dumbledore asks Harry to help recruit Horace Slughorn to return to teach. Slughorn has a critical memory that Harry must pursuade him to relinquish. Harry is successful. It clarifies the daunting task ahead of locating and destroying four Horcruxes before Voldemort himself can be killed. Harry and Ginny Weasley are falling in love. Finally, Albus Dumbledore is disarmed by 16 year old Draco Malfoy and killed by Severus Snape. A funeral is held at Hogwarts.