Rotorua Library has Genealogy books and other sources
Have you thought of using old newspapers online to search for birth and death notices?
National Library of NZ has a fabulous reliable online resource called Papers Past, although not all births, marriages and deaths are published this is still a very good place to start for all of New Zealand's newspapers that are digitised.
Here are just a few samples of what you may find :
|WAIRARAPA AGE, VOLUME XXXII, ISSUE 10697, 19 AUGUST 1912|
|Brief and to the point : Hastings Standard, 14 November 1898|
|Wedding of Miss Nora Curtis of Rotorua in |
King Country Chronicle 15 March 1909
|A Rotorua Silver Wedding in Evening Post 21 September 1939|
For more information click the link to Papers Past at the top of this post.
Also check out previous posts for Family History Month