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Dr. Brenda Denzler, whose own book, The Lure of the Edge, informed my study. The library included her own research, as well as the research of ufologists and organizations like MUFON (the Mutual UFO Network) and CUFOS (Center for UFO Studies) and the works of other academics and researchers studying the phenomenon. I read the works of Allen Hynek, Jacques Vallee, John Keel, Budd Hopkins, and John Mack, as well as those of people who theorize the phenomenon academically, such as Jeffrey Kripal, Whitley Strieber, Debbora Battaglia, Greg Eghigian, Carole Cusack, Susan Lepsetter, and David Halperin.
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D.W. Pasulka (American Cosmic: UFOs, Religion, Technology)