I just started reading
The Greening of America written in 1970 by Charles A. Reich. It's revolutionary, and I love all 12 pages that I've read so far.
Another great one that I read a few months back is
Autobiography of a Blue-Eyed Devil by Inga Muscio.
Confessions of an Economic Hitman by John Perkins is good too, although I've faltered and not finished it.
As far as spirituality is concerned (can we even mix spirituality and politics without becoming truly revolutionary--is this allowed??

), I like Starhawk's
Dreaming the Dark and also Barbara Marcianik's
Bringers of the Dawn.
For an imagining of history, I like to go back to Riane Eisler's
The Chalice and the Blade.
Peace,
Pathless