Biographies:
* The First New Zealanders: A detailed account of the early Polynesian settlers in New Zealand, covering their arrival, society, and culture.
* The First 50 Years: A comprehensive history of New Zealand from its initial settlement to the end of the 19th century.
* The Great War 1914–1918: New Zealand's Story: A detailed account of New Zealand's involvement in World War I, covering the military campaigns, home front experiences, and its impact on society.
* The Second World War 1939–1945: New Zealand's Story: A continuation of his previous work, this book explores New Zealand's participation in World War II, including its military involvement and the home front experiences.
* The Life of Sir Edmund Hillary: A biography of the famous New Zealand mountaineer and explorer, covering his life and achievements, including his historic ascent of Mount Everest.
Other Works:
* New Zealand in the Twentieth Century: A comprehensive history of New Zealand during the 20th century, covering its economic, social, and political developments.
* The Dominion of New Zealand: A collection of essays on various aspects of New Zealand's history and culture.
Barry Gustafson is considered a leading historian and writer on New Zealand history, and his books are widely respected for their scholarship and accessibility.