Treatises (i.e. books) are an especially valuable source for background or in depth research. These publications provide authoritative analysis or commentary regarding the subject matter and often reprint the full text of primary source documents.
In addition to the Law Library & University Libraries online catalog (The CAT) we have access to the other Big Ten university library catalogs, as well. Although the primary focus of some of these library collections is nonlegal, it is likely that they would include some materials relevant to your research. For example, Pattee/Paterno Library at University Park is a U.S. government and European Union depository library and would have a vast quantity of relevant legal material. For the most part, the University Libraries collect heavily in U.S. and international materials. If you are unsure how to use The CAT, one of the librarians will assist you.
You have access to books from all over the world by using the following databases found on the Law Library Research page under:
Discover Library Resources (http://pennstatelaw.psu.edu/library/research ):
The following indexes and databases can be used to find articles in law and law-related journals:
To expand the list of resources that might include articles, you should consult the Law Library's A-Z Databases webpage. Filter your search by clickiing on the pull-down menu for All Database Types; then choose Articles for a list of databses that includes periodical articles. This menu choice provides filters to retrieve databases that include articles, indexes, news, full text, ebooks, abstracts and more.