You can use Scout, the Libraries' search tool, to search for articles and books by a particular author. From the search screen, enter the author's name, select Author, then hit enter or select Search.
This usually works best when you don't place the author's name in quotation marks, since authors' names can be listed in many different ways (William Faulkner; Faulkner, William; William Cuthbert Faulkner; William C. Faulkner, etc.).
You can also use a citation index to find articles written by a particular author. Which citation index to use depends on the subject; for example, Web of Science covers sciences, social sciences, arts, humanities, and international conference proceedings. You can find other indexes by going to the Libraries' databases page and selecting Indexes and Abstracts from the Types menu.
You can also use Google Scholar to search by author. Be sure to access Google Scholar through this link or the library website so the service will recognize you as a UA student: Access to Google Scholar.