Here's a link to a zip file!
it holds a word file containing a recent slam poem/parable of mine.
so with your book-
I think the easiest way to do it is like I've done cd's @ clockwork, you want to have a single directory called 'files' or something and put everything but the html file with the Table Of Contents (TOC) or first page in there. then link to the files from the TOC.html. the user would have no reason to look in the 'files' folder, and if they did it wouldn't really be a big deal... maybe we could even secure it or something, but I'm not sure how that would all work. It ends up looking quite classy, but it means you'll have to redo the links in your TOC.
keep me updated!