Volume 1 on public law provides an introduction to the Nigerian legal system. The various chapters deal with: introduction and sources of law; jurisprudence and Nigerian perspectives; African customary law; Islamic law; comparative constitutionalism and Nigerian perspectives; citizenship, immigration and administrative law; judicial system and legal profession; criminal law, evidence and civil procedure; statutory marriage and divorce laws; customary marriage and divorce; marriage and divorce under Islamic law; matters of children; gender and law in Nigeria with emphasis on Islamic law. Volume 2 has 25 chapters on private law that includes security of the environment and environmental law, land and property administration, commercial business and trade laws, communication, media and press laws, transportation and carrier laws, law enforcement, armed forces and military laws, investments, and intellectual property.

The classic reference work that provides annually updated information on the countries of the world.