Lonely planet books are 3 for the price of 2.
AND Maybe another 10% thru Moneybackco - see their site.
When you add the titles you want to your shopping cart there is a box for promo code. Enter CITIBANK (must be capitals) into this area and "voila" you get 20% off the order including the 3 for 2 books.
Now this may mean you have saved so much you will drop below $A60 so you will have to pay for shipping.
You can increase your order by buying another cheap book, BUT this will eliminate the free book you got (still there but NOT free). So instead of the 4th book, you can just buy some pdf pages of "downloadable" books or a digital city map of some major world city ($3 - not discounted). to make the order over $A60.
In the sample order I was going to buy 3 books cost $56.13 and shipping was $6. By adding $6 of digital guides the shipping was free.
There maybe other "tricks" you can try.
Note the conditions of the buy 2 get one free say promo codes can't be entered but the CITIBANK code works or at least works to the point where you have to enter all your details - but unlikely to change.
Also if you enter extra books or some products the 3 for 2 discount disappears so you have to be selective in adding more products.
Like all promos it can end at anytime… so be quick and enjoy
I bought 3 books for the price of 2 plus free delivery! Awesome!