Carnegie is joining forces with bookstore and coffeehouse Politics and Prose, to host James Lovelock, author of The Revenge of Gaia (Basic Books, $25) in the newly completed David Greenwalt building for a book-signing and talk on September 8, starting at 7 p.m. The Politics and Prose newsletter states, "While working for NASA in the '60s, Lovelock formulated the Gaia hypothesis, postulating that the Earth functions as a super-organism. He recently made a stir in the environmentalist community with his pro-nuclear power stance. Lovelock is ahead of the curve once again with his take on the current state of the planet." For the official event announcement from Politics and Prose, click here. To learn more about Lovelock's book, see commentary by the author, or check out the review in the August 23 Style section of The Washington Post.