It will help you improve the way your chosen business makes money with advice and suggestions. It should give you ideas on how to improve what you are already doing.
As an added bonus, I am granting you permission to use the content on your own website or in your own blogs and newsletter, although it is better if you rewrite them in your own words first.
You may also split the book up and resell the articles. In fact, the only right that you do not have is to resell or give away the book as it was delivered to you.