There are several ways to find literary criticism.
For articles of literary criticism, the best database to begin with is MLA (the Modern Language Association International Bibliography.) Typically, typing your author's last name in one box and then the title of the work for which you want criticism in the next box works well.
To find books of literary criticism in our catalog, do a SUBJECT search for your author (last name first) then browse through the results to find the subject heading "criticism and interpretation"
For example, if you search for ELIOT, T.S., you'll get a list that looks like this:
Click the link that says "Criticism and Interpretation" to get a list of books.
Sometimes you'll get additional subject entries that mention specific works. For example, if you search for SHAKESPEARE, WILLIAM and scroll down, you'll see an entry for criticism and interpretation specifically for King Lear.
You can also do a KEYWORD search for the author's last name and several important words from the title of the work, such as PLATH AND BELL JAR