I have the exact question.  I am making two books at the same time for my two daughters.  In some cases, I would like to copy a chapter from one book and paste it into the other book so I don't have to recreate the same exact chapter twice.  Is that possible?

I learned that unfortunately, you can't copy and paste pages.  You can duplicate an entire book and then make modifications to the duplication.  Perhaps copying and pasting pages can be a feature in a future version of the software??  

How did you duplicate your book in bookify?