The Monk 
One of the most notorious of Gothic novels, The Monk is an essential text for any fan of the Gothic. It is libidinally charged and features many of the quintesstial Gothic plot engines: lust, a Faustian pact with the devil, magic, hidden identity, incest, cruelty, murder, drugs, religious hypocrisy.... it's pretty much the complete Gothic package.
- at Project Gutenberg (817K or zipped version 339K)
- at Munsey's/BlackMask
Additional Monk resources:
"The Gothic as Camp: Queer Aesthetics in The Monk"
by Max Fincher [Romanticism on the Net
"The Sexuality of Authorship in The Monk"
by Lauren Fitzgerald [Romanticism on the Net
The nine essays immediately below are from the special Matthew Lewis issue (volume 8, Nov. 1997) of Romanticism on the Net, guest-edited by Frederick S. Frank:
Guest Editor's Introduction
by Frederick S. FrankThe Monk: A Bicentenary Bibliography
by Frederick S. Frank"Cloistered Closets: Enlightenment Pornography, The Confessional State, Homosexual Persecution and The Monk"
by Clara Tuite"The Ghost of the Counterfeit—and the Closet—in The Monk"
by Jerrold E. Hogle"All Roads Lead to England: The Monk Constructs the Nation"
by Marie-Josť Tienhooven"Confessors and Penitents in M. G. Lewis's The Monk"
by Syndy M. Conger"Satire in The Monk: Exposure and Reformation"
by Ann Campbell"Heresy Hunting: The Monk and the French Revolution"
by James Whitlark"'Monk' Lewis as Literary Lion"
by Lisa M. Wilson
"Simon Brett on Matthew Lewis"
Overview of Lewis' novel. [Simon Brett, Kings and Queens of Crime]
"'Fitting the Taste of the Audience Like a Glove': Matthew Lewis's Supernatural Drama".
by Jonathan C. Glance [Mercer U])
Monk Lewis: A Critical Biography
By D. L. MacDonald. (U Toronto Press, 2000). Reviewer: Max Fincher. [Romanticism on the Net]