I just finished The Uprising by liberal author and journalist David Sirota. He tells us about his travels to meet with various groups in America who are fed up and taking action. Sirota visits the Minutemen on the CA/Mexico border, learns about the Working Families Party in NY and fusion voting, sneaks into an ExxonMobil shareholders meeting, talks to three progressive Senators including his old boss in the House, Bernie Sanders (I-VT), and much more. It's a fast, good read that reminds us that wanting to act is not the same as knowing how to act best, and in the words of activist Saul Alinksy, we must be honest about things as they are when we do decide to act (think FISA etc).
If you can afford to buy only one book in this down economy, it should probably be one about converting your house and car to renewable energy. But if you can afford another one, get The Uprising.