Sometimes you'll get linked to an Amazon product page. Sure, you could buy it from there, but if you're in Australia, Readings Bookstore is a way better place to get your p-books. They have numerous Melbourne locations, a great website* and free shipping anywhere in Australia.
It would be convenient, would it not, not have a handy bookmarklet which would copy the product title from the Amazon page you were looking at and search for that title at Readings? Yes, yes it would.
What are you waiting for? Drag the bookmarklet below to your favourites bar. Next time you're on an Amazon product page, you'll be ready**.
*Yes, we made it.
** I haven't actually tested this on more than two pages. YMMV.