The images are being taken off of a PDF of the original book. Oddly enough, the original book placed images on separate pages...even if it interrupted the flow of a paragraph. Personally, I am a fan of separate pages for pictures, so I may just be doing that to keep it as close to the original.
As for a <div> with "page-break-inside: avoid", I haven't tried it, but plan on doing so with the next conversion.
Thank you.