Hi Leena,
For books, go to the Library's online catalog, linked here http://www.sru.edu/academics/bailey-library/research. Try searching keywords like consumer, marketing or advertising. "Consumer behavior" as a Keyword Boolean search netted this title: Decoding the new consumer mind : how and why we shop and buy, by Kit Yarrow.
You can also find articles on that topic. Check back if you want help with that.
best,
Judy Silva