Bee - you should be able to get the SK book at any bookstore, like Angus and Robertson or Dymocks etc and I am pretty sure I have also seen it in Big W and Kmart - so might be worth a look, could be a lot cheaper from there. It does cost around $50 or $60 though. But you could also look on ebay or other places for second hand ones - not as up to date, but still good.