In its first 24 hours on sale, "Harry Potter and the Deathly Hallows," the seventh and final installment in the wildly popular series by J.K. Rowling that officially went on sale at 12:01 a.m. Saturday, sold a record 8.3 million copies in the United States, according to Scholastic Inc., the book's publisher.
That exceeded the 6.9 million copies that "Harry Potter and the Half-Blood Prince," the sixth in the series, sold in its first 24 hours on sale two years ago.
