8.3 million: Copies reported sold by Scholastic in first 24 hours
5.2 million: Copies sold through outlets tracked by Nielsen BookScan on July 21 and 22
2.2 million: Number of worldwide preorders at Amazon
1.4 million: Number of Amazon preorders in the U.S.
1.8 million: Copies sold by Barnes & Noble on July 21 and 22
1.2 million: Copies sold by Borders worldwide in first 24 hours