Final answer:
The author describes two main sources of Horror Literary Criticism: one that depicts monsters within bourgeois society, as in 'Dr Jekyll and Mr Hyde' and 'Dracula', and the other as the gothic and mystery tales containing supernatural elements and settings, exemplified by Edgar Allan Poe, Mary Shelley, and Ann Radcliffe.
Step-by-step explanation:
The two sources of Horror Literary Criticism that the author describes are, primarily, the genre of novels that deal with the monsters that are part of bourgeois society, as seen in works like Strange Case of Dr Jekyll and Mr Hyde and Dracula. These novels portray Victorian elites as terrible beasts beneath their respectable exteriors. Secondly, the mystery tale genre contains elements of monsters, occult forces, and magic, with authors like Edgar Allan Poe and Mary Shelley, as well as the gothic tale with supernatural occurrences in settings such as abandoned castles with ghosts and vampires, represented by writers like Ann Radcliffe.