I used these resources when researching the annotations for this fairy tale. Most should be available through your local library, but I have included links to the titles on Amazon.com for further reading.
Altman, Anna E. and Gail de Vos. Tales, Then and Now: More Folktales As Literary Fictions for Young Adults. Englewood, CO: Libraries Unlimited, 2001.
Amazon.com: Buy the book inpaperback.
Ashliman, D. L. A Guide to Folktales in the English Language. New York: Greenwood Press, 1987.
Amazon.com: Buy the book inhardcover.
Bernheimer, Kate. Mirror, Mirror On The Wall: Women Explore Their Favorite Fairy Tales. New York: Anchor Books, 1998.
Amazon.com: Buy the book inpaperback.
Bettelheim, Bruno. The Uses of Enchantment: The Meaning and Importance of Fairy Tales. New York: Vintage Books, 1975.
Amazon.com: Buy the book inpaperback.
Bredsdorff, Elias. Hans Christian Andersen: The Story of His Life and Work, 1805-75. New York: Scribner, 1975.
Amazon.com: Buy the book in hardcover or paperback.
Briggs, Katharine. A Dictionary of Fairies: Hobgoblins, Brownies, Bogies, & Other Supernatural Creatures. London: Allen Lane, 1976. [Published in U.S. as An Encyclopedia of Fairies. New York: Pantheon Books, 1976.]
Amazon.com: Buy the book inpaperback.
Byatt, A. S. Possession: A Romance. New York: Random House, 1990.
Amazon.com: Buy the book inpaperback.
Cashdan, Sheldon. The Witch Must Die. New York: Basic, 1999.
Amazon.com: Buy the book inpaperback.
Chevalier, Jean and Alain Gheerbrant. A Dictionary of Symbols, Second Edition. Translated by John Buchanan-Brown. New York: Penguin Books, 1982.
Amazon.com: Buy the book in paperback.
Cirlot, J. E. A Dictionary of Symbols, 2nd ed. Jack Sage, trans. New York: Philosophical Library, 1962. Reprinted by Dover in 2002.
Amazon.com: Buy the book in paperback.
Cooper, J. C. An Illustrated Encyclopaedia of Traditional Symbols. London: Thames & Hudson, 1978.
Amazon.com: Buy the book in paperback.
Davidson, H.E. "Helpers and Adversaries in Fairy Tales." A Companion to the Fairy Tale. Hilda Ellis Davidson and Anna Chaudhri, editors. Rochester, New York: D. S. Brewer, 2003.
Amazon.com: Buy the book in paperback.
de Vos, Gail and Anna E. Altmann. New Tales for Old : Folktales As Literary Fictions for Young Adults. Englewood, CO: Libraries Unlimited, 1999.
Amazon.com: Buy the book inpaperback.
Einfield, Jann, ed. Fairy Tales. San Diego: Greenhaven Press, 2001.
Amazon.com: Buy the book in hardcover.
Ferguson, George Wells. Signs and Symbols in Christian Art: With Illustrations from Paintings from the Renaissance. New York: Oxford University Press, 1966.
Amazon.com: Buy the book inpaperback.
Frank, Jeffrey and Diana Crone Frank. The Stories of Hans Christian Andersen: A New Translation from the Danish. New York: Houghton Mifflin, 2003.
Amazon.com: Buy the book in hardcover.
Franz, Marie-Louise von. Individuation in Fairy Tales. Boston: Shambhala, 1977, 1990. Amazon.com: Buy the book in paperback.
Jones, Alison. Larousse Dictionary of World Folklore. Edinburgh; New York: Larousse, 1995.
Amazon.com: Buy the book in paperback.
Knowles, Elizabeth. The Oxford Dictionary of Phrase and Fable. Oxford; New York: Oxford University Press, 2000.
Amazon.com: Buy the book in hardcover or paperback.
Leach, Maria. Funk & Wagnalls Standard Dictionary of Folklore Mythology and Legend. New York: Funk & Wagnalls, 1949.
Amazon.com: Buy the book inpaperback.
MacDonald, Margaret Read. Tom Thumb: The Oryx Multicultural Folktale Series. Phoenix: Oryx, 1993.
Amazon.com: Buy the book inpaperback.
Murphy, Bruce, ed. Benet's Reader's Encyclopedia, Fourth Edition. New York: Harper Collins, 1996.
Amazon.com: Buy the book inhardcover.
The New Lexicon Webster's Dictionary of the English Language, 1990 Edition. New York: Lexicon Publications, 1990.
Norris, Pamela. Eve: A Biography. London: Picador, 1998. New York: New York University Press, 1999.
Amazon.com: Buy the book inhardcover.
Olderr, Steven. Symbolism: A Comprehensive Dictionary. Jefferson, NC: McFarland & Company, 1986.
Amazon.com: Buy the book in hardcover or paperback.
Propp, Vladimir. Morphology of the Folktale. Austin: University of Texas, 1968.
Amazon.com: Buy the book in paperback.
Robbins, Mary E. "The Truculent Toad in the Middle Ages." Animals in the Middle Ages. Nona C. Flores, editor. New York: Routledge, 2000.
Amazon.com: Buy the book in paperback.
Tatar, Maria M. The Annotated Classic Fairy Tales. New York: W. W. Norton, 2002.
Amazon.com: Buy the book in hardcover.
Tatar, Maria M., ed. The Classic Fairy Tales. New York: W. W. Norton, 1999.
Amazon.com: Buy the book in paperback.
Tatar, Maria M. The Hard Facts of the Grimms' Fairy Tales. Princeton: Princeton University, 1987.
Amazon.com: Buy the book inpaperback.
Thompson, Stith. The Folktale. New York: Holt, Rinehart, and Winston, 1946.
Amazon.com: Buy the book in paperback.
Tolkien, J. R. R. "On Fairy Stories." Tree and Leaf. Boston: Houghton Mifflin, 1965.
Amazon.com: Buy the book in paperback.
Wullschlager, Jackie. Hans Christian Andersen: The Life of a Storyteller. Chicago: University of Chicago Press, 2000.
Amazon.com: Buy the book inhardcover or paperback.
Yolen, Jane. Touch Magic. Little Rock: August House, 2000.
Amazon.com: Buy the book inpaperback.
Zipes, Jack, ed. The Great Fairy Tale Tradition: From Straparola and Basile to the Brothers Grimm. New York: W. W. Norton, 2001.
Amazon.com: Buy the book inpaperback.
Zipes, Jack, ed. The Oxford Companion to Fairy Tales. Oxford: Oxford University, 2000.
Amazon.com: Buy the book inpaperback.
Zipes, Jack, ed. When Dreams Come True. London: Routledge, 1998.
Amazon.com: Buy the book inpaperback.