Source: Jane Friedman
If you have had a series out for a couple of years or longer, relaunching it eventually makes sense. A new cover and sales blurb can reignite sales which may have dropped or haven’t increased in some time.
From the original article:
“Book relaunches can take a variety of forms. If done right, they enhance your overall brand, as well as your book sales. Their first and foremost benefit is the new publication date. Having a new book opens up access to bloggers and media who might not have been available to you with an older book. Unless you’ve already been getting some interest in the book, books six months or older are harder to work with. You need to have a new book, or newer book, to capture more blogger and media attention.”
This article has some other great reasons why you should consider a relaunch along with some valuable tips on how to do it through Amazon which can be tricky.