Why do so many people believe in telepathy, magicians, past lives, alien abductions, and ghosts? What has led to the spread of the "scientific" version of biblical creation, the so-called "scientific creationism," and the belief that the Holocaust never happened? Why in this supposedly scientifically enlightened age do we seem to be in greater and more dangerous confusion than ever before? Historian of science Michael Shermer investigates the reasons why the paranormal phenomena and cults attract so many people. He also offers logical analyses and valuable insights so that we can not only learn the truth about the many deceptions and delusions that find resonance in today's society, but also be able to refute them. His arguments ultimately constitute a celebration of the scientific spirit and the joy one can derive from exploring the greatest mysteries of the world - even if many of the questions raised remain unanswered.