I loved your e-book. I also live in Sydney and find your pics quite interesting. I kinda realised that there are heaps of office slavers in your shots who left their buildings to have a smoke at Martin Place and around. Not quite sure, but I think one of them is my friend who works at Westpac - 275 Kent St.
Just a quick question, are all your photographs candid shots? With a 25mm lens, you need to get quite close for most of your shots, and even with 40mm I quite struggle.
I'll say hi if I see you around Martin Place!