I bought some weight loss books from my local post office shop the other day. They were $2 for the set of 4 in one of the bargain bins. I'm not sure if it's only specific Australia Post outlets that have them or if they are available in all stores. I've started reading one of the books and it's actually pretty good.
The books are, Throw Out Your Scales, Walk Off Weight, Lighten Up and The H-Factor Diet, all by Andrew Cate. I figured that at 50c per book it was worth buying them to see what they were like.
If you're interested it would be worth checking if your local Post Office Shop stocks them.