Books sales live and die based on reviews. I never used to write reviews but now that I realize how important they are I write them all the time. It only takes a minute. In my case just go to my Author page on Amazon, select a book you want to review, click on it and scroll down the page until you get to the review section. Then just follow the simple instructions. Amazon suggests books for you to read based on the number of reviews a book gets. The first hurdle is to get twenty and then fifty.