Books at Drake
These books will give you in-depth information about Treaties.
"[T]he term treaty, in the generic sense, signifies that the parties intend to create rights and obligations enforceable under international law," as explained in the glossary of the United Nations Treaty Handbook. Additional terms for treaties, which may have different nuances, include: convention, agreement, pact, understanding, protocol, charter, covenant, declaration, engagement, arrangement, and accord.
This guide focuses on treaty research related to the United States, United Nations and International agreements.
For more general international law research sources, see the Law Library's International, Foreign, and Comparative Law research guide.