The authors of the entertaining 388-page Conspiracy Theories and Secret Societies For Dummies make short work of debunking a bunch of popular tinfoil hat bugaboos, like Roswell, Area 51, underground government installations, chemtrails, faked moon landings, 911 truthers, Illuminati, etc. They also have a good section explaining why some people are attracted to conspiracy theories, and tips for being a good skeptic. The paperback version is just $8.42 and according to the decription, it was was required reading in a 2010 course on conspiracy at Harvard University. My kids are at the age when they are wondering about conspiracy theories, because it is a appealing but flawed filter for understanding a complicated world. I'm hoping they'll read it. I wish I had this book when I was a teenager.