aaplogo.jpgAccording to Association of American Publishers (AAP) sales figures, eBook sales increased by 158 percent in September compared to the same period last year–totaling $39.9 million in sales for the month.

These gains came on the heels of a 40 percent decrease in September adult hardcover sales compared to last year. Overall book sales fell 12.1 percent compared to the same period last year, totaling $1.1 billion in September.

The complete report is embedded below. Here’s more from the release: “[Y]ear-to-date E-book sales are up 188.4 percent. Downloaded Audio Books also saw an increase of 73.7 percent over last year, with sales of $7.7 million this September; and the category was also up 34.1 percent year-to-date. Physical Audio Book sales decreased 42.6 percent in September with sales totaling $11.6 million; sales for the year to date are down 12.6 percent.”

AAP September 2010 Sales Report