Google Books allows you to search the full text of some books. Many will be under copyright and you won't be able to see the full text, but you can then search SOUTHcat or WorldCat to see if you can obtain a copy. Public domain titles will often be available in the full text.
In order to use Google Scholar to access the Libraries' full text resources from off-campus you need to go through the Marx Library web site or through https://libproxy.usouthal.edu/login?url=http://scholar.google.com/ in order to be recognized as affiliated with the University of South Alabama. After you login, change your preferences: