The Story of Art
(As a side note, it's taken me a long time to realise that this method is not necessarily the most effective for everyone. My elder daughter learns best by watching documentaries; my husband through listening to podcasts; my younger daughter by researching on-line. I can push fascinating books at all of them but the chances of them actually flipping through them are minimal. Weirdos!)
So I decided to Learn About Art and this massive tome (first published in 1950, last updated in 1989) seemed like the perfect starting point. It was originally intended for younger readers -- teenagers at a guess -- and though it has many, many, MANY pages, there are loads of illustrations and the text is not too dense. I think I remember art students at my school lugging this around back in the 1980s. It has taken me many weeks to wade through this history, a chapter at a time, and I'm not sure how much of it I will retain long-term. There is a heavy emphasis on Western art and particularly painting, but hey, you can't cover everything and since my ignorance is pretty much total, it was just as well to chip away at one area.
E. H. Gombrich succeeds in laying out a fairly coherent narrative trail by framing each era of art as an attempt to solve the problems thrown up by the one before, which was an interesting, and to me, novel way to look at it. And best of all, now that I've finally finished it, I feel incredibly virtuous!