Mystery

Based on sales at independent bookstores nationwide for the eight-week period ending May 14, 2017.

Based on sales at independent bookstores nationwide for the eight-week period ending March 5, 2017.

Based on sales at independent bookstores nationwide for the eight-week period ending December 25, 2016.

Based on sales at independent bookstores nationwide for the eight-week period ending May 15, 2016.

Based on sales at independent bookstores nationwide for the eight-week period ending February 21, 2016.

Based on sales at independent bookstores nationwide for the eight-week period ending December 27, 2015.

Based on sales at independent bookstores nationwide for the eight-week period ending October 18, 2015.

Based on sales at independent bookstores nationwide for the eight-week period ending August 2, 2015.

Based on sales at independent bookstores nationwide for the eight-week period ending May 17, 2015.

Based on sales at independent bookstores nationwide for the eight-week period ending March 1, 2015.