In reply to osunde:
Hello Osunde,
The New Zealand Alpine Club have guide books covering the various areas of the Southern Alps. They're hard to find for sale in the UK, but book shops, mountaineering shops (Small Planet in Queenstown) and the DOC information centres (Department of Conservation) have them for sale. I have the whole set and would be happy to scan bits and bobs if you like.
Is there a particular grade you're looking for? Let me know if it's adventurous tramping and multi-day trips, scrambling or more technical climbing and I might be able to recommend something.
The DOC offices also stock topo maps at 1:50,000. They're good but a bit lacking in detail compared with UK OS maps. If I was a rich man, I'd pay for the OS to map New Zealand. You can access the whole of NZ mapped here - https://www.topomap.co.nz Just zoom in and start dreaming.
Cheeers, Jamie