While he was still on the Massachusetts Supreme Judicial Court, and before being named to the U.S. Supreme Court, Justice Oliver Wendell Holmes Jr. published a short volume called "The Common Law", which remains a classic in the field. Unlike Blackstone and the Restatements, Holmes' book only briefly discusses what the law "is"; rather, Holmes describes the common law "process". Law professor John Chipman Gray's "The Nature and Sources of the Law", an examination and survey of the common law, is also still commonly read in U.S. law schools.