What if a patron wants to find books on a certain subject?

Library of Congress Classification System: K

K     Law (Level 2)

K: General, Comparative and uniform law, Jurisprudence

KD: United Kingdom and Ireland

KDZ: America, North America

KE: Canada

KF: United States

KG: Latin America, Central America, West Indies

KH: South America

KJ-KK: Europe

KL-KW: Asia, Africa, Pacific Area, Antarctica

KZ: Law of nations