The CEO of Kobo (or Rakuten Kobo, to use the full name) has just told Publishers Weekly that sales of its e-readers are rising sharply for the second year in a row in the US.

The Kindle Colorsoft Signature Edition is the first color ereader released by Amazon, two years ago. It is also the most expensive one, with a price that now goes above $300. Well, it seems it is simply starting to disappear from Amazon stores worldwide… And there are several reasons for that.