Unit Sales of Print Books by Format (In Thousands)

Category Dec. 11, 2011 Dec. 9, 2012 % Chge Week % Chge Year
Adult Nonfiction 6,932 6,553 -5% -14%
Adult Fiction 3,310 3,348 1 -12
Juvenile Fiction 5,341 4,912 -8 -3
Juvenile Nonfiction 1,451 1,537 6 4

Unit Sales of Print Books by Format (In Thousands)

Category Dec. 11, 2011 Dec. 9, 2012 % Chge Week % Chge Year
Hardcover 6,463 6,037 -7% -7%
Trade Paperback 8,684 8,432 -3 -10
Mass Market Paperback 1,535 1,506 -2 -22
Board Books 666 657 -1 2
Audio 153 140 6 -8

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.