Field guide to the native plants of Sydney, by Les Robinson
Excellent book, Ive found it helpful even though I'm all the way up in sunny qld
Magic and medicine of plants by reader's digest
Good pictures, had many 'didnt know you could eat THAT' moments, not specific to your area but still very useful as it has alot of "weeds"
Wild food plants of Australia, by Tim Low
Awesome book. Wish I never lent it out cos I never got it back. Has lots of natives found all over Australia, good pics too.
http://www.eatthatweed.com/edible-weeds/ and their book is awesome, though they're centred in Melbourne I have found their info is relevant up here too and probably everywhere where the weeds grow lol
Hopefully this isn't too irrelevant slash late lol
Learning new wild(or supposedly ornamental) edible slash medicinal plants is a bit of a passion for me. I cry inside when work makes me spray the weeds. Now that I know that I could be eating them lol