Penguin Publishing
Penguin Random House: A Guide to "Twelfth Night" [Pdf]
Critical interpretation bibliography, scene-by-scene synopsis, and background information are available in this 14 page .pdf guide.
Other
Twelfth Night Revision
This entire site is dedicated to Shakespeare's "Twelfth Night," and it contains a wealth of resources for the Shakespearean comedy. In addition to summaries of each act, it contains interactive quizzes over the entire play, the...