Right now I'm in the middle of reading <em>Sparking a New Energy Revolution: Social Struggles in the Transition to a Post-Petrol World</em>. It's quite fascinating; its basically a collection of articles, papers, and essays that document contemporary radical social struggles surrounding issues of energy. Some of the articles are pretty bad, but there are enough well-written, well-researched, and persuasive to make up for those. And overall, the book will definitely give you insight into the underbelly of the energy world that more mainstream, technology/economy-focused books will never be able to match.
Another excellent book would be <em>Carbon Democracy: Political Power in the Age of Oil</em>, which was actually a textbook for a Political Economy 101 class I took at my local university. Its extremely well-written, and like The Prize, seeks to examine the history and politics of oil and coal, and how these two energy sources shaped history, politics, and power. I haven't read The Prize, but I suspect that Carbon Democracy will be a more left-wing account of the same content--there's a lot of arguments about Western imperialism, multinational corruption and collusion, and class struggle.