The American Association of Publishers (AAP) have released their figures for March. The headline figures were that e-books grew 145.7% year-on-year from March 2010 (in revenue terms), and print bounced back after a terrible start to the year, with two categories showing gains. Adult Hardcover was up 6% year-on-year and Adult Mass Market Paperback grew 1.2%. Adult Trade Paperback fell 7.7%. Despite that drop, Adult Trade Paperback was the #1 selling format at $115.9m, followed by Adult Hardback at $96.6m, e-books at $69m, and Adult Mass Market Paperback at $55.2m.