I really love Carl Sagan's The Demon Haunted World (Science as a Candle in the Dark). It's an amazing read that debunks the shit out of aliens and Bigfoot and crazy thinking in general. If you haven't read it there is a free pdf of the book at the link below. Good stuff!
http://www.metaphysicspirit.com/books/The Demon-Haunted World.pdf
I am going to read that! I never did.