In my most recent column for PopMatters, I look at what downloads of comics from your comiXology library means for the future of DRM:
When I buy a print copy of a comic, there are a number of things I can do with that copy beyond simply reading it myself. I can, as noted, loan it to someone else. I can give it away or even sell it. I may not have to buy the comic in the first place; in many cases I could check the book out from the library to do my reading. With print there’s a clear distinction between owning a copy of a work and owning the work itself. I can do what I want with an individual copy that I come to possess by legal means, but what I can’t do is start making copies of my own for sale or to give away; that right adheres to the owner of the underlying work.