Record-Breaking First Day: At 12:01 a.m. on July 16th, amid much cheering from fans who had lined up hours beforehand, booksellers across the country opened the first boxes of Harry Potter and the Half-Blood Prince. The books flew off into the night, selling a record 6.9 million copies in the first 24 hours.We couldnt be more delighted that the book is finally out with fans, but for you speed readers, sh! Year six has a lot of surprises, so lets not spoil it for those who havent finished yet. Happy reading!