I had completely forgotten that .mobi is proprietary! In principle, you're absolutely right. In practice, .mobi is easy to generate, modify, fold, spindle, and

I had completely forgotten that .mobi is proprietary! In principle, you're absolutely right. In practice, .mobi is easy to generate, modify, fold, spindle, and mutilate with free/Free software. Even Amazon's .azw is just mobi with * replacing $.