Harry Potter and the Half-Blood Prince continue. Harry finds out that the locket is not the real Horcrux, containing only a note from someone named "R. A. B.". Harry is so devastated by Dumbledore's death (and upset by its futility) that he tells his friends he will not be returning to Hogwarts. Instead, he will spend the next year searching out Voldemort's Horcruxes. Ron and Hermione insist on joining him in destroying Lord Voldemort for good. "Harry Potter and the Half-Blood Prince" is the sixth book in the Harry Potter series. The first book in the series, "Harry Potter and the Philosopher's Stone", was first published
Legal disputes over the Harry Potter series October 2007, Warner Bros. and Rowling sued Michigan-based publishing firm RDR Books to block the publication of a 400-page book version of the Harry Potter Lexicon, an online reference guide to her work. Rowling, who previously had a good relationship with Lexicon owner Steve Vander Ark, reiterated on her website that she plans to write a "Harry Potter" encyclopedia, and that the publication of a similar book before her own would hurt the proceeds of the official encyclopedia, which she plans to give to charity. A judge later barred publication of the book in any form until the case was