Start your search on the "Catalog" tab on the Library home page.
If you are looking for a specific Author or Title, you can change the "Keyword" box to reflect your search. Otherwise, type in one or two select keywords.
The results will show with the number of results at the top of the screen. If there are too many, you can use the filters along the left to limit, including by:
You can also often limit by Material Type, such as:
Date, language and topics will be available to limit to by as well.