Baen Books has been giving away ebooks for 10 years. If you like military action sci-fi, Baen has that and a few others.
A couple or years ago I bought Lois McMaster-Bojould's latest Miles Vorkodigsn novel (she's published by Baen). Included was a CD-Rom of all of McMaster-Bojoulx's other writing. Nobody had pushed e-books like Baen.