I have read somewhere that Amazon is making "unfair deals" with publishers and authors in order to bring the prices really low. These make Amazon always a target of conflicts, lawsuits and other misunderstandings. Check some of the issues below:
http://www.theverge.com/2014/5/23/57...mazon-hachette
http://bits.blogs.nytimes.com/2015/0...nlimited/?_r=0
http://www.seattleweekly.com/food/95...ed-authors-cap
http://andrewhy.de/amazons-markup-of...ors-is-129000/