James Randi's description of his hallucinatory experience can be found here.
Susan J. Blackmore's classic study Beyond the Body treats the phenomenon as a psychological non-paranormal event. Similar views are held by parapsychologists Harvey Irwin, Flight of Mind (London and New York: Scarecrow Press, 1985) and John Palmer, 'The out-of-body experience: a psychological theory', Parapsychological Review, 9, 1978, pp. 19-22, although Irwin argues that psi may be implicated in the veridical element.
There is a large bibliography of books and articles on the OBE phenomenon (see the site's homepage for other relevant material).
Books by individuals who claimed to experience the phenomenon regularly include
Robert Monroe, Journeys Out Of The Body, Sylvan Muldoon and Hereward Carrington, The Projection of the Astral Body, Caroline D. Larsen, My Travels in the Spirit Worlds and Yram, Practical Astral Projection.
Books that describe and analyse reported experiences include Robert J. Crookall's Case-book of astral projection, Celia Green, Out-Of-The-Body Experiences and J.H.M. Whiteman, The Mystical Life. See also Celia Green and Charles McCreery, Lucid Dreaming: The Paradox of Consciousness During Sleep, and Stephen LaBerge, Lucid Dreaming.
Here is a useful article by historian Carlos S. Alvarado: Trends in the Study of Out-of-Body Experiences: An Overview of Developments Since the Nineteenth Century.