There have been rumours around the internet these last weeks which claim Amazon will penalise poorly edited books.
I dug around to see what the story is and discovered that specific complaints from readers will trigger an e-book being examined.
If you want to read the entire article, and it is well worth doing so, then go http://johndopp.com/writers/amazon-kindle-spelling-mistakes/
Amazon staff are to review the complaints. The process is not automated. If it is decided that your book has problems, then you will have the chance to question the complaint or simply correct it. For errors prominent or numerous enough to detract from the reader’s enjoyment, Amazon will place a warning banner on the product’s page alerting customers that the item is under review. Authors and publishers will then have an opportunity to correct the issue and promptly remove the warning banner. (Amazon has already been doing this for years; they’re just expanding the conditions that can trigger an alert.)
Errors that render the book unusable or incomplete or books that violate Amazon’s Terms of Service will be removed from sale.
Some of the things Amazon will look for: