I tend to work on a lot of books at once.
School textbooks:
Women, Art and Society by Whitney Chadwick
Gardner's Art Through The Ages by Fred S. Kleiner, volumes I and II
Personal reading:
Behind The Pink Curtain: The Complete History of Japanese Sex Cinema by Jasper Sharp
Industrial Society And Its Future by Theodore Kaczynski
Currently set down/stalled:
Anna Karenina by Leo Tolstoy
The Information Age: Economy, Society And Culture Vol. II: The Power of Identity by Manuel Castells