You know the scenario... you're shopping on Amazon and you've bought a couple of books. The total comes to, say, £13.86 and Amazon says 'just spend a little bit more and you'll qualify for the £15 spent free delivery special.' Okay, you think, I'll go and buy something else. So you buy something you don't really want or need and all of a sudden your bill comes to £22 - you've qualified for free delivery but the total is way more than you wanted to spend!
What's the answer?
It lists all the really cheap 'filler' items you can buy on Amazon to push your shopping cart total to just over £15 without you spending a fortune.
I bought a book of short stories by Louisa M. Alcott for £1.02 but you can find even cheaper items on there (from 25p upwards). Give it a go!