Many tech publishers sell unrestricted .mobi files if you buy directly from them. Some sci-fi publishers do as well, though most of what I read on my Kindle com

Many tech publishers sell unrestricted .mobi files if you buy directly from them. Some sci-fi publishers do as well, though most of what I read on my Kindle comes from feedbooks.com. I didn't say don't do it; just to be aware that by buying books from Amazon, you're sending a message that you're OK with DRM.