This is the first is a series of posts on how ebook sales rank in the USA and the UK relates to the number and rate of ebook sales. While there are a number of tools available that will give an approximate sales outcome for a particular rank, they are a little like fruit machines. You put in your sales rank. Pull the handle. Out pops an estimate of the number of books you need to sell to achieve that sales ranking.
I thought it would be nice to present this data graphically so we can all see what is going on right across the full sales rank spectrum. I intend going down to where a ebook is selling only a handful of copies a year. This is below the resolution of the fruit machines.