Similar to the argument I make regarding the iPod. I'm paying for the pleasure of listening to X. I don't give a rat's @ss that it came to me on a piece of plastic (CD), or if it is encoded in a file on my computer. I further feel nothing about copying it to a format that is convenient for me to listen to.

When I purchased Irma Thomas's Simply Grand, I wanted to listen to it in my car. So I duplicate the CD and stuff that into my car. I also want to listen to it on my MP3 player... No worries. I believe the purchase of the CD allows me to listen to it on different formats. I'm paying for the music, the CD is simply a means to transfer that music.

In your case, you paid for the texts. You shouldn't be bound to use your LIT reader, kindle, or Schwindle...