Largest Book Manufacturers -- Best Sellers List

Fallen revenues among some book manufacturers in 2003, however, weren't reflected in retail sales. Net U.S. book sales rose nearly 5 percent in 2003, topping $23 billion, according to the Association of American Publishers (AAP).

Overall trade sales were up 1.2 percent, with sales of $5.1 billion, the AAP reports. And, as many predicted, e-books have been enjoying increased sales, reveals Kathryn Blough, a representative for AAP. "E-books are definitely growing, but I don't think that will cut into the print side."