Answer
A great place to start for many topics is the database Bloom's Literature. You'll be prompted to log into delaGATE for access. Bloom's has a nice mix of biography, overview, and literary criticism.
Find more suggestions on our A-Z Databases list. You can narrow the list to databases that offer literary criticism.
For even more guidance check our our literature library guide.
The specific databases you choose will depend on your topic and the type of information you need. Contact a librarian for specific suggestions for your topic.