Who’s on Top?

I went to the UK version of Amazon, and expected to find that Harry Potter and the Order of the Phoenix would top the list of 100 hot books. But no, Harry Potter is number 2. At top of list is: Dr Atkins' New Diet Revolution: The No-hunger, Luxurious Weight Loss Plan That Really Works! What? If you go to the American version of Amazon, you will indeed find Harry Potter on top. In second place is: The South Beach Diet: The Delicious, Doctor-Designed, Foolproof Plan for Fast and Healthy Weight Loss. Not sure what to gleam from all of this except for the fact that the British are finally catching up to the Atkins craze, while Americans have moved on to the South Beach diet.