In _The Demon-haunted World: Science as a Candle in the Dark_, Sagan methodically tears apart and debunks a variety of pseudoscientific topics, including alien abductions, crop circles, and the face on Mars. Although Sagan sometimes gets more than a little overly-strident in his support of his SETI project and nuclear winter scenario, the book is a well-written and very readable treatment of science for the lay public. However, the easily offended should know that throughout the book, Sagan often attacks organized religion for encouraging, or even creating, much of the pseudoscience which exists today. Overall, a good book to have the next time you feel like emulating "Skeptical Inquirer" authors.