Instructions:Apply voucher at checkout SUMMERSENSATION - free delivery for orders over £10. This voucher may only apply to full priced books (not sure as have not used it) - but may be worth a go if you are buying a discounted book(s). Have used them before and although they are not that fast, they do have a good website and an excellent selection of academic books. Not sure how long this deal last - email just says 'summer'. I know there are 20% codes on here, which is the same, but i dont know when they expire - this voucher looks to have a long shelf life!