This could be quite useful to students or those that order a bulk number of books regularly.

I would include the word 'country' in the title.

You should have a bottom line conversion into a currency that is understandable to the user so they can see the overall price difference. I know you highlight the cheapest - but it should be shown to the user so they know what the saving is.

Some improvements do need to be made as some prices were blank / not pulled through but when I checked directly they were significantly cheaper than the one that was highlighted.