Rankings reflect sales figures, for the week ending May 10, at 3,985 bookstores plus wholesalers serving 60,000 other retailers, statistically weighted to represent sales in all such outlets nationwide.

Rankings reflect sales figures, for the week ending March 5, at 3,050 bookstores and wholesalers serving 28,000 other retailers (gift shops, department stores, newsstands, supermarkets), statistically weighted to represent sales in all such outlets nationwide.