@allisonbrown — Preference is that the images have alt-text, if they are not decorative, and attributions, at minimum. Captions would be good to have too, though I think with Philosophy of Mind, the issue we faced was having a title or caption that would be meaningful enough and different from the alt-text. See some of the suggestions we had for one of the images in chapter 5: Philosophy of Mind [ed: Heather Salazar]. Perhaps @xolotl, who did the formatting on this book, can share a bit about the thought process behind when to include/leave out image captions?
Are the media/image attributions displaying correctly once the images have been reinserted? If not, please let me know and I can troubleshoot.