Harry Potter and the Half-Blood Prince
The Half-Blood Prince is of great mystery to Harry. Harry finds a book with the Prince's name on it and finds that it has many helpful tips for making potions. He follows the tips and is seen as very smart to Professor Slughorn. His friend Hermione is mad that Harry is getting credit for information that he does not really know. The old professor, Professor Snape, is now teaching Defense of the Dark Arts.