September 2010 e-book sales statistics

E-book sales statistics for September 2010 have been released by the Association of American Publishers (AAP) via IDPF. Trade e-book sales were $39.9 million for September 2010, a 158.1% increase over September 2009. IDPF reports calendar year to date revenue is up 188%. Note: These figures represent the 12 to 15 trade book publishers who have been willing to supply their data to IDPF.