- Walpole, Horace. The Castle of Otranto. Oxford: Oxford University Press, 2014.
-
Groom, Nick. "Introduction," in Horace Walpole, The Castle of Otranto. Oxford: Oxford University Press, 2014.
-
Morris, David B. "Gothic Sublimity." New Literary History 16, no. 2 (1985): 299-319.
-
Lake, Crystal B. "Bloody Records: Manuscripts and Politics in The Castle of Otranto." Modern Philology 110, no. 4 (2013): 489-512.
-
Riely, John. "The Castle of Otranto Revisited." The Yale University Library Gazette 53, no. 1 (1978): 1-17.
-
Kashdan, Joanne G. "The Castle of Otranto." Masterplots, Fourth Edition (November 2010): 1-3. Literary Reference Center, EBSCOhost (login required; accessed March 22, 2017).
-
Dunn, Jennifer. "Literary Contexts in Novels: Horace Walpole's "The Castle of Otranto." Literary Contexts In Novels: Horace Walpole's 'The Castle Of Otranto' (September 2006): 1. Literary Reference Center, EBSCOhost (login required; accessed March 22, 2017)
-
Mazzeno, Laurence W. "The Castle of Otranto." Magill’S Guide To Science Fiction & Fantasy Literature (October 1996): 1-2. Literary Reference Center, EBSCOhost (login required; accessed March 22, 2017).
-
SÜNER, AHMET. "The Comic Tragedy of Mere Men and Women: The Ambiguously Distracting Use of Laughter in The Castle of Otranto and Its Prefaces." Atlantis (0210-6124) 38, no. 2 (December 2016): 11-26. Academic Search Premier, EBSCOhost (login required; accessed March 22, 2017).
-
Fincher, Max. "Guessing the Mould: Homosocial Sins and Identity in Horace Walpole's The Castle of Otranto." Gothic Studies 3, no. 3 (December 2001): 229. Academic Search Premier, EBSCOhost (login required; accessed March 22, 2017).
-
Dent, Jonathan. "Contested Pasts: David Hume, Horace Walpole and the Emergence of Gothic Fiction." Gothic Studies 14, no. 1 (May 2012): 21-33. Literary Reference Center, EBSCOhost (login required; accessed March 22, 2017).
-
Chaplin, Sue. "Spectres of Law in The Castle of Otranto." Romanticism 12, no. 3 (December 2006): 177-188. Academic Search Premier, EBSCOhost (login required; accessed March 22, 2017).
- Brackett, Virginia. "The Castle of Otranto." Facts on File Companion to the British Novel: Beginnings through the 19th century, vol. 1. 3/22/17. <www.fofweb.com>.
- Hager, Alan. "Walpole, Horace." Encyclopedia of British Writers. 3/22/17. <www.fofweb.com>.
- Snodgress, Mary Ellen. "Gothic Setting." Encyclopedia of Gothic Literature. 3/22/17. <www.fofweb.com>.
- Snodgress, Mary Ellen. "Walpole, Horace." Encyclopedia of Gothic Literature. 3/22/17. <www.fofweb.com>.
- Snodgrass, Mary Ellen. "The Castle of Otranto." Encyclopedia of Gothic Literature. 3/22/17. <www.fofweb.com>.
- Missing, Sophie. "The Castle of Otranto by Horace Walpole." The Guardian. 3/24/17. <https://www.theguardian.com/books/2010/mar/14/castle-of-otranto-horace-walpole-review>.
- Eastlake, Charles. "Horace Walpole's Taste for the Gothic: Strawberry Hill." Victorian Web . 3/26/17. <http://www.victorianweb.org/art/architecture/strawberryhill/1.html>.