I recently came across a site (myebook.com) that allows you to put together ebooks fairly simply. In addition to text, you can also include Flicker photos, YouTube videos, Facebook content, and other online materials. So, you could include a video tutorial, pictures of your trip to Yuma, or even a book trailer. To me, however, the best part is that you can host the books on your own site for free as well, which means making your website stickier.
Website: my ebook