A past president of the Dunedin branch of the New Zealand Institute of International Affairs has written a well-balanced and wide-ranging study of the issues behind the current dispute between the United States and New Zealand over nuclear ship visits. There are solid chapters on the ANZUS alliance, the prospect for New Zealand's pursuing a policy of nonalignment or neutrality, and the various proposals for nuclear-free zones in the Pacific. Both the American and the New Zealand cases on port calls are presented fairly. The author concludes that the ANZUS alliance has provided a wide range of unequally beneficial defense activities among Australia, New Zealand and the United States, and that New Zealand has contributed the least and gained the most from these. In the absence of ANZUS, he says, New Zealanders would have to live with a lot less security and a greatly degraded defense preparedness at much increased cost.