Author Credentials and Authority -- look for a brief author biography and the name of the publisher:
Intended Audience -- look at:
Type in only the words most important to your topic. If you don't get enough results, you may need to be more general.
Note: the Library Catalog does not search the full-text of books. It looks at the title, author, subject headings, and any details provided (such as table of contents).
More info on using the library catalog is in the How to...Find Books guide.