This is a pretty nice offer - Lonely Planet currently have a 20% off sale on their site, with 20% off the face value of their books and travel guides. Here's the nice bits - the 20% discount code works on top of that (see link below)... AND you get a whopping 18% quidco cashback!!
I'm off to buy a few books, at what literally works out at about a 40% discount when you include quidco!!!