I've just started reading Flim Flam by James Randi. It's a skewering of pseudoscientific nonsense (things like the bermuda triangle, the cottingley fairies, uri geller, etc). It was written in the early eighties, so it's aged, but it's still fascinating. What's interesting is that I find very few people who still believe in nonsense like the bermuda triangle, but a great many who still believe in nonsense like creationism and homeopathy.
An entertaining read so far.