A legal encyclopaedia of legal principles covering every Australian jurisdiction. It provides references to Australian legislation and cases. Hyperlinks are also embedded giving access to a number of case report series providing access to full text judgments.

Over 1,700 alphabetically arranged entries, the Companion features: the fundamentals of all the major areas of law such as criminal law, tax and social security law, human rights law, family and employment law, education law, sports law, international and EU law; the role and workings of legal institutions such as parliaments, courts, law schools, and international bodies such as the EU and the UN; leading cases, famous trials and distinguished lawyers, past and present; and major events in legal history and major debates in legal theory.