Fascinating data on the actual prices pain for ebooks, and the best price points from an overall revenue perspective.

From talking to my users, they fall broadly into two categories. First there is the avid readers who buy many books each week; their watchlist is so long that they are happy to buy whichever is cheap today. Then there is the reader who has a particular book in mind; they do not buy very often but when they do, they are not price-sensitive, they just want the book straightaway.

But why the difference between the US and the UK?