Search the Library Catalog
Tips for searching the catalog:
Google Book Search works just like web search. If the book is out of copyright, or the publisher has given Google permission, you'll be able to see a preview of the book, and in some cases read the entire text. If it's in the public domain, you're free to download a PDF copy. If the full-text is not available, try searching for it in the library catalog or requesting it through Inter-library loan.
Maybe you're not finding what you want to find and do not believe it even exists! Try searching WorldCat. You may find that you cannot get the book, but at least you will know it exists somewhere.