Much interesting literature is, thankfully, out of copyright, making it possible for folk to publish it on the web. Some publishers do also make some work available for free. I won't pretend that the following is exhaustively complete; and most of it dates from 1997 so many links here may well be broken; but here, all the same, is a haphazard bunch of links to some of what's out there. A larger collection of links may be found at Free e-Books: The Ultimate Guide.