- George Hansen, "CSICOP and the Skeptics: An Overview," The Journal of the American Society for Psychical Research vol. 86, no. 1, January 1992, pp. 19-63. I've not seen a more detailed history of contemporary skepticism elsewhere.
- Stephanie A. Hall, "Folklore and the Rise of Moderation Among Organized Skeptics," New Directions in Folklore vol. 4, no. 1, March 2000.
- David J. Hess, Science in the New Age: The Paranormal, Its Defenders and Debunkers, and American Culture, 1993, The University of Wisconsin Press.
There's a lot of literature on parallel social movements of various sorts, including much about advocates of some of the subject matter that skeptics criticize, and some of that touches upon skeptics. For example:
- Harry Collins and Trevor Pinch, "The Construction of the Paranormal: Nothing Unscientific is Happening," in Roy Wallis, editor, On the Margins of Science: The Social Construction of Rejected Knowledge, 1979, University of Keele Press, pp. 237-270.
- Harry Collins and Trevor Pinch, Frames of Meaning: The Social Construction of Extraordinary Science, 1982, Taylor & Francis.
- Ronald L. Numbers, The Creationists: From Scientific Creationism to Intelligent Design, 2nd edition, 2006, Harvard University Press.
- Christopher P. Toumey, God's Own Scientists: Creationists in a Secular World, 1994, Rutgers University Press.
In some ways, the skeptical movement also resembles a sort of layman's version of the activist element in the field of science and technology studies, based on positivist views of science that are the "vulgar skepticism" dismissed in this article:
- Michael Lynch, "Expertise, Skepticism and Cynicism: Lessons from Science & Technology Studies," Spontaneous Generations vol. 1, no. 1, 2007, pp. 17-24.
- Philip Kitcher, The Advancement of Science: Science Without Legend, Objectivity Without Illusions, 1995, Oxford University Press.
- R.C. Olby, G.N. Cantor, J.R.R. Christie, and M.J.S. Hodge, Companion to the History of Modern Science, 1990, Routledge.
UPDATE (September 27, 2014): Some additional works I recommend for skeptics:
- Harry Collins, Are We All Scientific Experts Now?, 2014, Polity Press. A very brief and quick overview of science studies with respect to expertise.
- Massimo Pigliucci, Nonsense On Stilts: How to Tell Science from Bunk, 2010, University of Chicago Press. A good corrective to the overuse of Popper, easy read.
- Massimo Pigliucci and Maarten Boudry, Philosophy of Pseudoscience: Reconsidering the Demarcation Problem, 2013, University of Chicago Press. Good collection of essays reopening the debate many thought closed by Larry Laudan on whether there can be philosophical criteria for distinguishing the boundary between science and pseudoscience.