Not exactly an "alltime favourite", but well worth the investment are these Aussie pcos books (not sure if you can get them in NZ?):
John A. Eden - Polycystic Ovary Syndrome :A Woman's Guide to Identifying and Managing PCOS.
http://www.dymocks.com.au/dynamic/Fu...SBN=1741145279
The New Glucose Revolution:Managing PCOS by Jennie Brand-Miller, Prof. Nadir R Farid & Kate Marsh.
http://www.hha.com.au/books/0733618472.html
Low GI guide to Managing PCOS Jennie Brand-Miller, Prof. Nadir R Farid & Kate Marsh.
http://www.hha.com.au/books/0733621236.html
There's a bunch of other pcos books available by writers from other countries too.
Back to the alltime faves...