There is a whole load of guide books available for New Zealand. Here I list the major ones of interest to the budget minded traveller / backpacker.
Rough Guide New Zealand
4th Edition published September 2004 1024p £14.99
Lonely Planet New Zealand
? Edition published September 2004
Lonely Planet Australia and New Zealand on a ShoestringÂ
1st Edition published April 2005 836p £15.99
This book covers both Austrailia and New Zealand, witht he focus very much on budget travel. Under half of the 800+ pages are about New Zealand, so it is not the most detailed guide, but handy if you do plan to visit both countries.
Other books of interest: