A little doubt plagues me at Amazon.com. Every time I prepare to Click to Buy, I wonder: Would this book cost me less if I bought it from Amazon's British site at Amazon.co.uk? Or from Amazon.de? Or from its Japanese site at Amazon.co.jp? I answer the question at Pricenoia.com. Type the name of the book you want to buy into the search box on Pricenoia.com's homepage and the site will calculate exchange rates and compare prices (including shipping) at all Amazon sites.