Despite panic among many publishers and booksellers about the state of the business, figures compiled by Nielsen BookScan show that unit sales fell only 0.2% in 2008, to 756.1 million. The juvenile category had the strongest year, with unit sales ahead 6.2%; Stephenie Meyer's Twilight series was strong enough to help offset the roughly 10 million units sold in 2007 of Harry Potter and the Half Blood Prince. Unit sales of adult nonfiction were off the most in 2008, down 3.9%. The “other” category, which includes such items as calendars and maps, fell 2.0%. BookScan tracks about 70% of all book sales.

The figures also show a shift in consumers' format preference. Unit sales of trade paperbacks rose 2.0% last year, and sales of mass market paperbacks, a format that has struggled in recent years, had a 2.4% unit gain. Hardcover sales, meanwhile, fell 3.6%.

2007 2008 % Change
Source: Nielsen BookScan
Total 757,641,000 756,070,000 -0.2%
Subject Group
Adult Nonfiction 311,429,000 299,364,000 -3.9%
Adult Fiction 202,881,000 203,678,000 0.4
Juvenile 177,976,000 188,966,000 6.2
Other 65,355,000 64,062,000 -2.0
By Format
Hardcover 191,963,000 184,948,000 -3.6
Mass Market Paper 120,176,000 123,087,000 2.4
Trade Paperback 387,524,000 395,202,000 2.0
Other 57,978,000 52,833,000 -8.9
*All figures exclude nontraditional panel, which was added in 2008