Harry Potter and the Half-Blood Prince is the 6th book of J.K. Rowling’s adventurous novel series, documenting Harry Potter’s 6th year of attending Hogwarts School of Witchcraft and Wizardry.
Harry Potter is now 16 and is getting ready for new life-changing events, including being able to apparate and taking suitable classes to prep him for an Auror career (a job position responsible in seeking out and fighting against dark magic). Along the way, Harry and his friends discover the meaning of adolescence, with young romance blossoming all around them, but that is not all.
After realizing and building up his wizarding abilities for the past 5 years and developing his rival relationship with the greatly feared dark wizard Lord Voldemort – Harry, and his school headmaster, Professor Dumbledore, are on a mission to understand Voldemort’s past – in attempts of getting the upper hand in defeating him and his dark followers (the Death Eaters).
Meanwhile, Harry suspects that Draco Malfoy, a student in the same year is working closely with Voldemort, stewing up a plan to put them all in danger. Harry spends a lot of time trying to incriminate Malfoy, even though his two best friends, Ron Weasley and Hermoine Granger are against the idea.
Along the way, his Potions teacher, Professor Slughorn unknowingly gives Harry a textbook containing potion-making shortcuts and un-heard of spells and charms. Harry finds that the book once belonged to a student who called himself the “Half-blood Prince”. Little does Harry know that he has already met this previous student, and that he is already a major part of Harry’s life.
Through magical means of research, Harry and Dumbledore uncover a puzzle that unlocks the mystery behind Lord Voldemort and his seemingly impossible return to the wizarding world (he was thought to be killed long ago when Harry was born.) Together, Harry and Dumbledore go on a quest to retrieve an object that could possibly help them defeat Voldemort.
Upon returning to the school, they find that the Death Eaters have come to Hogwarts, resulting in a major fight. Several truths are discovered, and Harry vows that he will do whatever it takes to defeat Voldemort, in a set-up for book 7.