I'm a digital novelist myself, so I believe I can answer your question.
My opinion is that the best way of digitally presenting a novel is through the browser - browsers these days are becoming very competent, and one can create an entire site (with a little web design of course) devoted to a story, so that when a visitor visits the site, he is transported to a fictional world built by the author. In fact, strange that you should be asking about links and images - I talked about them in my blog because I am a believer of novels empowered by digital technology. Check them out, I'm sure you will find them enlightening in your search for answers/inspirations.
Also, a rather famous digital novel that you can check out: Inanimate Alice. It's a YA novel though, don't know if it's to your liking.