From the library website chose the "Research by Subject" tab. Then select "Humanities."
Choose the Literature Resource Center from the "Core Resources." Conduct searches with the title of the book and the author's name. Also, try searching for articles that discuss the major themes from your book, or the literature style of your author. You may find articles with information that you could compare or contrast in your essay.
Under "Additional Resources," you can select another literary databases, "Books and Authors."
You could also try general and scholarly databases for articles, specifically Academic Search Premier and JSTOR, both on the Humanities Subject Page,
And you might search the library catalog for the title of the book to identify literary criticicism.
For information about writing about literature, you could take a a look at the Purdue OWL link below.