The Corpus Juris Secundum (C.J.S.) with subtitle: Corpus Juris Secundum: Complete Restatement Of The Entire American Law As Developed By All Reported Cases (1936- ) 101 volumes. An alphabetical arrangement of legal topics as developed by U.S. federal and state cases (1658-date). Selected references to cases since the mid-1930s.

The CJS is an authoritative 20th century American legal encyclopedia that provides a clear statement of each area of law including areas of the law that are evolving and provides footnoted citations to case law and other primary sources of law. Named after the 6th century Corpus Juris Civilis of Justinian I Emperor of the Byzantine Empire, the first codification of Roman law and civil law.