PW's look at weekly sales of print books based on numbers from Nielsen BookScan.
Unit Sales of Print Books by Category
|Category||Sept. 18, 2011||Sept. 16, 2012||% Chge Week||% Chge YTD|
Unit Sales of Print Books by Format
|Format||Sept. 18, 2011||Sept. 16, 2012||% Chge Week||% Chge YTD|
|Mass Market Paperback||1,668||1,157||-31||-26|
Category segment excludes “other,” which includes audio, maps, calendars, and other miscellaneous categories. Format excludes calendars, boxed sets, and other formats (i.e., maps, minibooks).
Source: Nielsen BookScan and Publishers Weekly. Nielsen BookScan’s U.S. Consumer Market Panel covers approximately 75% of the print book market and continues to grow.