<human>: Give me the gist of the text in a nutshell

I was looking at buying a paperback book and checked to see if it was available for my Kindle instead. It's available, but it's 20% more than the paperback version!

What gives? It's a digital product-- no shipping is involved, no manufacturing is involved, the cost to produce it (digitization of the original book) surely cannot outweigh the costs of the paperback version. Part of the reason why I bought a Kindle 3 years ago was because readers were told that e-books would be cheaper and more easily accessible than physical books.

I don't pirate books, but just for the hell of it I checked to see if this particular book was available on the private torrent site I use and it is. Here I am wiling to pay for the book when I have the option of downloading it for free, and the publisher has the audacity to charge 20% extra. (For the record, I only torrent movies/TV shows I already have on DVD because I can't bring myself to re-buy them on Blu-Ray).
<bot>: Why are some e-books more expensive than their paperback versions? Is it just sheer greed, or is there another price factor that I'm unaware of?