(in thousands)
Units week ended 2/17/13 %Chge week ended 2/10/13 % Chge between 2/12/12– 2/19/12 %Chge YTD
Total 11,988 9% 1% 14
Retail & Club 9,233 6 0 -2
Mass Merch./Others 2,755 20 13 85
Category
Adult Nonfiction 4,518 4% -1% -1
Adult Fiction 2,976 6 -1 22
Juvenile Nonfiction 777 15 4 11
Juvenile Fiction 3,178 20 6 5
Format
Hardcover 3,085 15% 4% 5
Mass Market Paperback 1,651 1 -4 23
Trade Paperback 6,375 8 1 3
Board Books 525 22 -1 15
Audio 89 12 4 -3

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 80% of the print book market and continues to grow.