"Scientific skepticism defines skepticism around the principles of scientific investigation. Specifically, scientific skepticism addresses testable claims; untestable claims are simply outside the realm of science." (Steven Novella & David Bloomberg, Skeptical Inquirer, 1999)
An Encyclopedia of Claims, Frauds, and Hoaxes of the Occult and Supernatural by 
The Demon-Haunted World by 
The Skeptic Encyclopedia of Pseudoscience by 
Flim-Flam! : psychics, ESP, unicorns, and other delusions by 
Science, Good, Bad, and Bogus by 
The Truth about Uri Geller by 
Why People Believe Weird Things by 
Psychic Sleuths by 