This book written by J K Rowling is considered the demise of Hogwarts. This is a play of stories between the Dark magic and the Wizards at Hogwarts and Ministry. The professers are protecting Harry from being caught. Harry is on his own mission of destroying the Horcruxes and making Dumbledore’s Army. And for that, ministry is in search of them. And Harry needs Hermione and Ron by his side to help him. They help him. Professor Dumbledore is killed by Draco and Professor Snape by Dark Magic. And it is now, the story takes rough turns. Harry takes help from all professors and gains trust and respect among his colleagues in creating an army. Lord Voldemort has already set traps for Harry, but somehow escapes and his survival is possible. There are numerous stories and characters involved. The potion book written by a half blood prince makes Harry attend his potions classes go well. Harry finally finds that the half blood prince is Professor Snape himself.