3.5 stars, for producing about as many questions as answers. I was either totally engrossed or unequivocally stumped, such that this book had the peculiar quality of addressing amateur and prior-knowledgeable readers by turns. I learned a terrific amount, and I suppose it could be said in favor of Ivins’ laconic captions that I’m eager for more, but some of his remarks left me in the dark completely without further, deeper explanation. Hmm...perhaps if this were simply shorter, more treatise-length, I wouldn’t have regretted the gaps so much, because learning by looking is a brilliant approach to this subject area, and this book certainly leans into visual material. In short: quite accessible; confidently recommended.