Perkowski, Jan L., The Darkling: A Treatise on Slavic Vampirism (Columbus, Ohio: Slavica, 1989).

, ed., Vampires of the Slavs (Cambridge,Mass.: Slavica, 1976).

Pyle, Robert Michael, Where Bigfoot Walks: Crossing the Dark Divide (New York: Houghton Mifflin, 1995).

Ramsland, Katherine, Piercing the Darkness: Undercover with Vampires in America Today (New York: HarperCollins, 1998).

Regardie, Israel, The Golden Dawn (St. Paul: Llewellyn, 1971).

Rieti, Barbara, Strange Terrain: The Fairy World in Newfoundland (St. John’s: ISER, 1991).

Rogo, D. Scott, An Experience of Phantoms (New York: Taplinger, 1974).

,The Haunted Universe (New York: Signet, 1977).

Rogo, D. Scott, and Jerome Clark, Earth’s Secret Inhabitants (New York: Grossett and Dunlap, 1979).

Roper Organization, Unusual Personal Experiences: an analysis of the data from three national surveys conducted by the Roper Organization (Las Vegas: Bigelow, 1992).

Rose, Carol, Spirits, Fairies, Goblins and Gnomes: An Encyclopedia of the Little People (Santa Barbara: ABC–CLIO, 1996).

Sanderson, Ivan T., Investigating the Unexplained (Englewood Cliffs, N.J.: Prentice-Hall, 1972).

Sedgwick, Paulita, Mythological Creatures: A Pictorial Dictionary (New York: Holt, Rinehart and Winston, 1974).

Senn, Harry A.,Were-Wolf and Vampire in Romania (New York: Columbia University Press, 1982).

Settanni, Harry, The Philosophical Foundations of Paranormal Phenomena (Lanham, Md.: University Press, 1992).

Shuker, Dr. Karl P. N., From Flying Toads to Snakes with Wings (St. Paul: Llewellyn, 1997).

Smith, G. Elliot, The Evolution of the Dragon (Manchester: Longmans, Green, 1919).

South, Malcolm, ed., Mythical and Fabulous Creatures: A Source Book and Research Guide (New York: Greenwood, 1987).

Spalding, Thomas Alfred, Elizabethan Demonology (London: Chatto and Windus, 1880).

Spence, Lewis, The Fairy Tradition in Britain (repr. Kila,Mont.: Kessinger, n.d.).

Stewart, R. J., Robert Kirk: Walker Between Worlds (Longmead, Dorset: Element, 1990).

,“The Tomb of a King,” pp. 261–266, in The UnderWorld Initiation (Wellingborough: Aquarian, 1985).

Summers, Montague, The Vampire In Europe (New Hyde Park, N.Y.: University Books, 1966).

,The Werewolf (New Hyde Park, N.Y.: University Books, 1966).

Sweeney, James B., A Pictorial History of Sea Monsters (New York: Crown, 1972).

Taillepied, Noel, A Treatise of Ghosts, tr.Montague Summers (London: Fortune Press, n.d.).

Thompson, David, The People of the Sea: A Journey in Search of the Seal Legend (London: Barrie and Rockliff, 1965).

Thompson, Keith, Angels and Aliens: UFOs and the Mythic Imagination (Reading, Mass.: Addison-Wesley, 1991).

Tyrrell, G. N. M., Apparitions (London: Duckworth, 1953).

Underwood, Peter, Peter Underwood’s Guide to Ghosts and Haunted Places (London: Piatkus, 1996).

Walker, Barbara, ed., Out of the Ordinary: Folklore and the Supernatural (Logan, Utah: Utah State University Press, 1995).

Walker, D. P., Unclean Spirits: Possession and exorcism in France and England in the late sixteenth and early seventeenth centuries (London: Scolar, 1981).

Whitlock, Ralph, Here Be Dragons (London: Allen & Unwin, 1983).

Wilson, Colin, and Damon Wilson, The Mammoth Encyclopedia of the Unexplained (New York: Carroll and Graf, 2000).

Wyman,Walker,Mythical Creatures of the United States and Canada (River Falls, Wis.: U.Wisconsin—River Falls Press, 1978).

Zhao, Qiguang, A Study of Dragonology, East and West (Ph.D. diss., University of Massachusetts, 1988).