From 9/11 and Roswell to Princess Di and the grassy knoll, this survey explores 18 of the world’s most intriguing conspiracy theories. The facts surrounding each theory are examined in detail, exploring the background of those who presented them as well as other lesser-known arguments. Following the recent virtual explosion of conspiracy theory interest and activity on the World Wide Web, the examination includes recommendations for websites that advocate, speculate, and debunk. At once informative and entertaining, this is a detailed, clear-eyed exploration for those who think they've heard it all.