Browsing (like in a book store) is sometimes the best way to find interesting books on your topic. Here are the call number ranges (think of it as subject sections) where you are likely to find books on communication topics:
The Google Book Search lets you search the full-text of millions of books
The books come from publishers and libraries. Because the Google Book Search searches the full-text of the books in its database, you can sometime find more information that you would find searching a library catalog
Are the books available online?
No. Some are, but most of them are not. Sometimes you will have access to only a chapter or two, sometimes just the table of contents.
If you find a book that you need, contact the VC/UHV Library - we can get the book through our InterLibrary Loan Service. It's free.