With the advent of the internet, publishing your own books and other products has
never been easier.
At its most basic, all you have to do is put your product up on a web page. Of course,
there's more to it than that but, to be honest, not much more. In fact, nowadays you
don't even have to write your own product. So long as you can rent space on the
internet and publish files to that space, you can become a publisher.