Mark Coker's fourth annual 2015 Smashwords Survey. Examines quantifiable characteristics of ebooks that help authors reach more readers. The 2015 survey attempts to answer such questions as: Do readers prefer longer or shorter ebooks?; Do ebooks that start out as preorders sell better?; How should I price my ebook?; Do series books sell better than standalone books?; do series with FREE series starters earn more money than other series; and many more. For historical context, check out the prior three years of Smashwords Surveys, all here at Slideshare.