Publisher Rocket is a must-have for self-published authors! It is the easiest tool and puts the power of Amazon's algorithms right in your hand. This tool has helped me reach #1 new release in multiple categories as a first-time author with a small following. There is no way I could have done that on my own. Their team also is willing to help you in any way and provides best-in-class customer service. I'm a fan for life and will tell authors everywhere to get this tool!