The cataLION also points to resources in these two ebook collections:
If you need help locating a book, ask a librarian.
Other resources for locating books:
WorldCat is the most comprehensive catalog of U.S. and world libraries and is more appropriate for upper level classes. WorldCat includes direct links to Interlibrary Loan to make requesting a book easier. It isn't always possible to get a book in WorldCat--for example, we can't borrow outside the U.S.
A public version of WorldCat is also on the web.
Google Books provides different levels of access to the contents of its books. You may find enough material to use in your paper, or locate a book that seems perfect for your topic.
Project Gutenberg is a large collection of free ebooks. Some titles are fairly recent.
If you need a book for your research, no matter where you discovered it, you can use Interlibrary Loan (ILLIAD) to request a copy. Books come from other libraries so plan ahead to be sure you get what you need in time.