The Metropolitan Museum of Art is making fifty years worth of books free on the Net.
I downloaded about ten from the Met Publications site. No charge. Easy search. Easier browse (since I don’t know much about art). Download as PDFs.
The artwork is, as you would expect, spectacular.

I downloaded “Bloom” because in my other life I take a lot of photos of flowers. Published in 1995 and now out of print, Bloom is a “celebration of flowers in fashion.” I didn’t read the text but I enjoyed looking at the photos and was amazed by the dressmaker’s lavish attention to detail.
I was especially intrigued by two books of American Indian art — Masterworks from the Museum of American Indian and Native Paths: American Indian Art from the Collection of Charles and Valerie Diker. I’m researching tribal legends, myths and belief systems to round out a character for the third book of the Black Orchid Chronicles. That manuscript is almost done, but I need to add some heft to the “Pony That Sees Far” character, aka for dumb white folk as Joe.
If you love ancient Egypt, you have just unlocked a graduate study of resources not just of Egyptian art but hieroglyphic language. Teach yourself Egyptian. It’s free.
I don’t know much, if anything, about art. I don’t write about art.
But I think any writer could find at least a half-dozen useful resources here. And did I mention it’s free?