But when I buy and pay for, legally, a book, I expect to be able to read it on the device of my choosing.
I don't expect to have to jump through loops installing software. You don't even HAVE software for Linux, for heaven's sake. So I have to install loads of stupid workarounds just to try to read the book which I bought and paid for legally.
You know what? it's quicker to just download a pirate version.
Adobe DRM - attempting to prevent piracy, but actually encouraging it.