Author : J. K. Original title Rowling Harry Potter and the
Half-Blood Prince
Voldemort and his "Death Eaters" were openly make a big disorder in the entire country of Great Britain | British. Cornelius Fudge was thrown from his position as Minister of Magic for 'shouting' magic community for his mistakes Voldemort handle this. He was replaced by Rufus Scrimgeour as the new Minister of Magic. In this new regime, formed the new department structure and Arthur Weasley get a promotion. At his home in Spinner's End, Severus Snape get a visit from Draco Malfoy's mother, Narcissa and her sister, Bellatrix Lestrange. Narcissa Snape do to swear non-violated, for Snape to protect Draco and, if the task fails Draco, Snape must complete the task given by the Prince of Darkness.
At the party started the new school year, Snape was announced has been appointed as Defense Against the Dark Arts teacher is new, it is very surprising to most students of Hogwarts, especially because for years he did not get that position. Using Harry Potter, Albus Dumbledore managed to persuade his old teacher, Horace Slughorn, to end his retirement, and returned to teach at his old position, as the Potions teacher.
Since Slughorn only ask for a minimum value of "E" ("Exceed Expectations" - "Beyond the Allegations") in OWL to proceed to the advanced class ([NEWT) Potions, Harry and Ron had the opportunity to enroll in the class. Slughorn lends Harry an old textbook "Advanced Potion Making," which marked the owner, "Mixed Blood Prince." The records of the owners of small book that was gifted to help Harry to excel in Potions class, and earned a reputation over Hermione. As a reward, Slughorn gave a vial of Felix Felicis gift, liquid luck.
Harry tells her suspicions, that Draco Malfoy may be a Death Eater, to Dumbledore, who apparently do not worry, just like Ron and Hermione. Later, it is known that Dumbledore had ordered Snape to investigate.
Dumbledore gives Harry private lessons begin. These lessons form the past knowledge of Voldemort and is given in the form of coffee into the memories of people who never associated with Voldemort's past, using a kind of magic tool basin, Pensieve. One memory that is a copy from the memory of Slughorn has a section missing. Dumbledore assigns Harry to work on that memory from Slughorn. Helped by the fluid Felix Felicis, Harry finally managed to get a piece of that memory from Slughorn. Dumbeldore speculates that Voldemort has divided his soul into seven parts, and save the six parts of his soul in "Horcrux". Two Horcruxes have been destroyed, the first being Tom Riddle's diary which was destroyed by Harry, and Marvolo Gaunt's ring by Dumbledore.
When Harry and Dumbledore will go to find the Horcruxes, Harry Disapparated with Dumbledore to a secret cave hidden. To get that Horcrux (a legacy of Salazar Slytherin locket necklace), Dumbledore's condition became very weak due to be taking some sort of liquid surrounding the Horcrux. They immediately returned to the castle of Hogwarts and Voldemort's Dark Mark glowing found hovering over Hogwarts. They are ambushed by Draco Malfoy on Astronomy Tower. Draco admits that he has opened the way for the Death Eaters to enter Hogwarts, although Dumbledore found that boys who obviously fear that has been forced to assist children pieces of Voldemort.
Death Eaters arrive and urge Draco to finish his mission-killing Dumbledore-but Draco hesitated. Snape arrives; Dumbledore pleading to Snape, "Severus ... please ...", but it is unclear what prompted Dumbledore told Snape that. After that, suddenly Snape kills Dumbledore with the curse of the killer-Unforgiveable Avada Not Kedavra Curse (Curse Killer) Avada Kedavra. Strength curse threw Dumbledore beyond the walls of the tower. Dumbledore's death, causing Harry's charms that hold lifted. Harry liberated and pursue Snape. Both short duel, Snape introduced himself as the Half-Blood Prince, and alone with Malfoy, Snape managed to escape through the gates of Hogwarts.
Harry found the Horcrux locket necklace on Dumbledore's body and found that it was a fake Horcrux. In the locket, the place to put photos, found a piece of parchment with a record of who called the author with the initials "RAB". Real Horcrux has been stolen and will be destroyed with the hope that when Voldemort meets his match, Voldemort "made up of ordinary people again, who can die."