Many of these books include what I call a “large HTML file” or a “monolithic HTML file”. This is the entire book in one HTML page. These files can be quite large, because not only do they include all of the text, they also include the images embedded into the HTML. But this means that you can take the file anywhere, including off the network, and still read it, as long as you have a web browser. It works great on your iPhone or iPod Touch if you have something like Air Sharing to copy files.