You might be better off with some general works that are classically
oriented: 'the Nude', by Kenneth Clark, 'the Story of Art', by E.H.
Gombrich. The Story of Art is an overview of western art history, the Nude
is less an introduction, but is still accessible, and is one of my
favorite books.
I've also read some of the small Penguin guides to art, I think there is
one on the Renaissance. I also like what I've seen of the books by Sister
Wendy, I thought she had some very insightful things to say about
Caravaggio.
What a wonderful opportunity.