Originally Posted by Gudy
Ah, OK, the problem is a slightly different one then: While ripping mp3s from a CD is something that can be largely automated, this is definitely not true for the creation of e-books and paper books from the same source. At some point after the proof reading stage, the two processes diverge, and both require non-trivial amounts of human effort to get decent results. Bundling the e-book with the paper book would then have to account for that effort in the pricing somehow.
On the other hand, the effort to make both formats has already been made. Offering both as a bundle may
get you more profits as people that would otherwise only buy one format (paper or ebook) will pay the extra to get both. On the other hand, of course, you'll get less profit from people that would have bought both separately.