Online guides, such as Sparknotes or CliffsNotes, have a nice amount of summary and background, but take the time to evaluate their quality.
Use these sites as a reference and not as cited sources in your essay. They are no substitute for your own critical reading of the text or literary criticism found in scholarly journals or books.
Explore the following website for primary and secondary works along with useful information about literary criticism.
Use Google Scholar for a preliminary search. Don't forget to check the library and library databases for titles you may find through Google Scholar! Many scholarly works still remain unavailable on the web.
