You may now wish to bring out different versions of the same text for different markets. For example, you might see a need to have a version of your text for women and another for men, or novices and experienced people in your field.
Now that you have reusable text chunks you can set up a new thought under the main “Title” thought “New User Version” and under that create a new set of chapters and include text chunks from the other version. You may need to write some new chapter introductions, and a new Foreword will most certainly be the requirement to let your customers know who this book is for and what it has in there that will be appealing to that new market.
You may also want to add some new text chunks and include those in some of the current chapters, or there are some text chunks that will need to be missed out as the readers are more experienced and they do not need those chunks.
As many versions as you like can be produced by simply creating a new chapter structure and including thoughts, which are linked to text structures. The author has one book with four different versions, each for a different market. When I update the text chunks, I can update all versions and produce updates and revisions to those version through only one set of work –work on my text chunks.