This book fills a definite need, the only guide which is useful to a traveler visiting New Zealand with stop-overs in Fiji and Rarotonga, or visits to any of the Pacific Islands. The range maps are small but readable, the text description is minimal. A disappointment is the small size of the illustrations, cramming most birds into the space of a one-inch rendering. This is an unavoidable consequence of the multiplicity of plumages depicted.
Larger illustrations would have necessitated a much large and heavier book. This one, at least, will not overburden your pack.
A nice feature is a summary for each country, listing the birds which are endemic there, found nowhere else. Fiji, for example, has 149 species, and 28 endemics. All the birds are keyed to the specific islands on which they are found. Fiji #31 denotes Mago (a private island owned by Mel Gibson, according to the Rough Guide to Fiji). The book is filled with interesting facts like this.
For New Zealand birds I think you will be better served by one of the NZ bird books. I am still using my 1979 Collins edition, with good illustrations by Elaine Power. Next time I am in Wellington I intend to update that.