Want to browse the shelves? Here are the Library of Congress call numbers for foreign policy and related subjects:
JF20‑2112 Political institutions and public administration (General) Comparative government
JK1‑9993 Political institutions and public administration (United States)
JL1‑3899 Political institutions and public administration (Canada, Latin America, etc.)
JN1‑9689 Political institutions and public administration (Europe)
JQ21‑6651 Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)