Sci-fi and technothriller writer Cory Doctorow says his special edition hardcovers have consistently been his biggest earner

From Forbes, Ebooks encourage authors to stare at their shoes instead of shoot for the stars.

http://www.forbes.com/sites/suwcharmananderson/2012/01/30/ebooks-encourage-authors-to-stare-at-their-shoes-instead-of-shoot-for-the-stars/