http://4wdsouth.co.nz/index.php has a great book authored by Mark Wilson, an experienced 4WDer based in the south island. His book contains 113 south island tracks and trails. The tracks are graded from easy through to very challenging so you can easily select routes that match your abilities and equipment.
I have a copy of his previous book co-authored by Ken Silby which also contains basic 4WDing tips and tricks to get you out of a bind. The current book is likely to also have this section but I can't be sure.


