Use the library catalog to find book-length biographies of your author. Use the advanced search so that you can focus your search to retrieve books that are more precisely on your topic.
In the advanced search, use the author's name as a SUBJECT and use the truncated keyword biograph* (this will pick up biography and biographical). Limit the scope to PSU Library or PSU & Summit Libraries. Use the left hand column filters to limit to ebooks and print books.
Here are the results of a catalog search on Fitzgerald as the subject and the truncated keyword biograph*.