Constitutional Law provides an authoritative treatment of constitutional law in New Zealand. It is drawn from Philip A Joseph’s Joseph on Constitutional and Administrative Law (5th ed, Thomson Reuters, Wellington, 2021), the authoritative text on public law in New Zealand. The author is an acknowledged authority on New Zealand constitutional and administrative law.

This new edition continues the high scholarly standards that distinguished the earlier editions. It represents a thorough and comprehensive revision of constitutional law developments since the previous edition published in 2014. It interrogates contemporary developments, while retaining the scholarly account of the doctrinal foundations of public law that is a defining feature of the text. A key development with this fifth edition is the new chapter that records increasing integration of tikanga Maori in legislative and judicial developments. The author interprets these developments as comprising a new form of legal pluralism that signals a distinctively indigenous, New Zealand jurisprudence.