As far as New Zealand goes, the one guide that most visitors and even locals will find really useful is the Coastal Cruising Handbook. This covers the east coast of the North Island pretty much north of Auckland and the out-lying islands off that part of the coast.
This handbook covers virtually every meter of the coastline and includes every possible anchorage and many that I wouldn't sleep in. It is pretty comprehensive.
Other volumes that I have used are
(courtesy Amazon.com) and
(also courtesy Amazon.com
Notably these covers are not the same as the ones we have (mine are on the boat and not within my immediate grasp) so I'm guessing that they're new editions. That would be good news because the copies that we have were of some use but were quite out-dated when it came to real detail (shops, chandlers, availability of stuff, some political issues, etc)