PW's weekly look at print book sales based on numbers from Nielsen BookScan.

Unit Sales of Print Books by Category

Category Aug 14, 2011 Aug 12, 2012 % Chge Week % Chge YTD
Adult Nonfiction 5,763 4,265 -26% -16%
Adult Fiction 3,831 3,129 -18 -13
Juvenile Fiction 2,908 2,353 -19 -2
Juvenile Nonfiction 684 666 -3 3

Unit Sales of Print Books by Format

Category Aug 14, 2011 Aug 12, 2012 % Chge Week % Chge YTD
Hardcover 2,945 2,359 -20% -6%
Trade Paperback 8,222 6,524 -21 -11
Mass Market Paperback 1,913 1,388 -27 -25
Board Books 296 269 -9 1
Audio 104 87 -16 -9

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.