I looked into this issue awhile ago and may have even written about it in HN. The publishers are trying to take a larger share of the income from Amazon for eB

I looked into this issue awhile ago and may have even written about it in HN. The publishers are trying to take a larger share of the income from Amazon for eBooks over traditional publishing leaving the authors with less than before even though production costs for publishers are far lower for eBooks. Amazon was trying to work to get authors at least the same proportion of the money they get for eBooks as for hardcopy traditional books.