Offers a somewhat random search of books scattered across the country. Some full text searching of books, and some full text viewing of out-of-copyright materials. You may be able to request books viewed via Interlibrary Loan.
Much like Google Books, this contains scans of a variety of books held in libraries internationally.
Search the catalog for likely terms and look closely at your results.If you find something that looks interesting, and you want to see similar results, click on the LC Subject – this will take you to other books on the same topic.