If you're going to New Zealand and you are a "Lord of the Rings" fan, then this book is a must. Slim enough to slip into the baggage without disturbing the scales, it is a detailed guide to the places where the films were shot. Detailed descriptions of routes, paths and unmade roads will get you to the places you recognise. You could spend months touring the country just seeking out locations - or just visit some of the places mentioned when you happen to be nearby. Also, the articles from some of the people involved in choosing the locations are interesting.
If you are not going to NZ, then the book is probably only worth buying if you are a hardcore "Lord of the Rings" anorak. The magnificent scenery doesn't really come across in the small format photos - much better to go and take your own pictures!