During his third year at Hogwarts School for Witchcraft and Wizardry, Harry Potter must confront the devious and dangerous wizard responsible for his parents' deaths.

Harry Potter, a fourth-year student at Hogwarts School of Witchcraft and Wizardry, longs to escape his hateful relatives, the Dursleys, and live as a normal fourteen-year-old wizard, but what Harry does not yet realize is that he is not a normal wizard, and in his case, different can be deadly.

There it was, hanging in the sky above the school: the blazing green skull with a serpent tongue, the mark Death Eaters left behind whenever they had entered a building... wherever they had murdered...
When Dumbledore arrives at Privet Drive one summer night to collect Harry Potter, his wand hand is blackened and shrivelled, but he does not reveal why. Secrets and suspicion are spreading through the wizarding world, and Hogwarts itself

...

Harry Potter and the Half-Blood Prince takes up the story of Harry Potter's sixth year at Hogwarts School of Witchcraft and Wizardry at this point in the midst of the storm of this battle of good and evil.

"-Entréguenme a Harry Potter -dijo la voz de Voldemort- y nadie sufrirá ningún daño. Entréguenme a Harry Potter y dejaré el colegio intacto. Entréguenme a Harry Potter y serán recompensados."
Mientras se sube al sidecar de la motocicleta de Hagrid y trepa a los cielos, dejando Privet Drive por última vez, Harry Potter sabe que Lord Voldemort y los mortífagos no están lejos. El encanto protector que ha mantenido a Harry a salvo

...