http://www.fool.com/investing/genera...l-survive.aspx
"The Baen dudes understood early on that electronic reading is a poor substitute for holding a real book, so the e-books and chapter excerpts serve as awesome marketing materials.
Download an entire book, read enough to get hooked, and then you'll eventually get tired of staring at a stupid screen for hours. So in the end, readers who really want to read these books tend to plunk down a few bucks for the real deal. This theory may not work quite so well for rockers and crooners, but authors seem to have a real revenue source secured for years to come. The Kindle and such gadgets will ultimately just make us buy more books."