The figures are statistically adjusted to represent sales in all such outlets across the United States.
(+) Rankings reflect sales figures, for the week ending May 17, at 3,985 bookstores plus wholesalers serving 50,000 other retailers (gift shops, department stores, newsstands, supermarkets), statistically weighted to represent sales in all such outlets nationwide.
(+) Rankings reflect sales figures, for the week ending May 24, at 3,985 bookstores plus wholesalers serving 60,000 other retailers, statistically weighted to represent sales in all such outlets nationwide.