I will look into the PDF approach as a a way to distribute a Publisher book. It sounds very promising. And the reader's ability to zoom in an a given media sounds especially interesting.
My tests have shown this works very well. It is also very easy to drop a book PDF onto a thumb drive for distribution. I forgot to mention, but I am thinking about creating books for each of my "direct ancestors" and make the scope include spouses, children, etc. and go back as many generations as needed. usually 5-6 will do it. This is working for most of our family lines for my wife and I.