I was mildly appalled at Charissa Newark's advice on how to get Amazon reviews, recently posted by the Independent Publishing Magazine.
"The easiest way to get reviews for your book is to create fake profiles and then review it yourself. (You'll be sure to get a 5 star rating!) However, many authors don't feel right about doing this."
They don't feel right about outright dishonestly? Well, then there might be hope for us yet.
"The next best way to get reviews for your book is to ask friends and family to read it and to post a review. They'll be likely to give you a favorable review, but you won't have to coach them on what to write."
Okay, so posting fake reviews is "best", and getting your mother to do it is the next best?
My suggestion would be to consider slightly more than how your book does in search results. And if you do want to use black hat SEO methods, consider not talking about it publicly like it is the most normal thing in the world.
Oh, and at least consider getting reviews from the most obvious source: customers. They may not be easy to get and all 5-star, but they mean a hell of a lot more to other customers, to Amazon and--I would hope--to the author.
I would also recommend getting book promotion advice, wherever possible, from a person who has actually successfully written, published and promoted a book.
(Of course the entire post was only written in the first place to game the Google PR system by getting the backlinks in the bio.)