It will help relatives of cancer sufferers understand the basics about this very common disease.
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.