Exploring New Zealand’s most important and extensive relationship—with Australia—on a variety of levels, this wide-ranging, fresh analysis focuses on trans-Tasman communities largely ignored by national histories. The narrative concentrates on 20th-century relations in a working region defined by a history of traffic in ideas, policies, objects, and people between the two countries. From early maps of Australasia to accounts of a shared business world and sports bonds, a common past is unearthed and reordered in a history filled with wit and insight.