Amazon are odd with small titles that are priced in Euros. Amazon take their info from a publishing news feed type thing. Believe it or not they can't tell the difference between Euros and Sterling prices. They assume that everything on this feed is in GBP. Astoundingly, they aren't prepared to change the information on the site. Annoyingly, they will keep all that extra profit (£5 per book) and none of it would come to me or the publishers.