The "strange" phenomenon of fundamentalism

The other day I received in my campus mail box an announcement from the British publisher Routledge for several encyclopedias, including their Encyclopedia of Fundamentalism. Not having seen the volume, I do not know how they are defining fundamentalism, which is almost always used as a term of derision in the media and the academy. The cover bears photographs of, among other things, Billy Graham and the Mormon Temple in Salt Lake City, Utah. My guess is that fundamentalist for them covers anyone who actually believes what his or her confession of faith claims to be true. Which includes yours truly.