These databases will be useful to you in your research:
These books, along with many other titles, can be found in the Reference and circulating section of the Library. Click on the title to go the record in the Library Online Catalog.
Although free literary criticism websites are few, here are some links that will help you as you research. Note: please also check the American Lit and English Lit Internet Resources tabs for additional sites.
The Paris Review has interviewed playwrights, novelists, poets and artists for the last sixty years. They have recently made available all of their interviews online and viewing is free. This is a valuable source when conducting research in literary criticism.