Let me hold off on this until this evening.

The images I see are not wrapped in a <figure> block and they need to for the caption to be semantically connected to the image. Some are not separated within <p></p>, which may cause some issues.

and

your images are right or left justified, so I need to mock up a new figure class and test it out before I do a massive change on your book (that can go awry if poorly done).