Last night, on a whim, I started rereading Carl Sagan's The Demon-Haunted World. It's been about four years since I first read the book, and I have matured as a reader since that time. While before I thought it was a good book, I now think it is a great book. Quite possibly one of the best non-fiction books I've ever read. I would strongly encourage anyone who hasn't read it to do so.
The Demon-Haunted World is a book about skepticim and wonder, the two central components of science. More importantly, the book is about moving forward as a culture in an honest way. To paraphrase the author, I'd rather know the painful truth than a pleasant lie. The book's subtitle, Science as a Candle in the Dark, puts it quite nicely.
Carl Sagan was one of the greatest popularizers of science, and I can't recommend his work enough. The Demon-Haunted World is certainly the most in-the-moment relevant, but all his books are fantastic.