You need to select a publishing plan (a comprehensive FREE plan is available) as depicted below before you can actually publish your book in order to set the legal terms and business terms by which your book is published.

We worked with a number of publishing pros and really fancy lawyers to come up with terms that were exceedingly friendly, flexible and fair with the hope that they would be sufficient for most. In general, we really do not like paying those fancy lawyers large sums of money, so we hope that the terms will work for you as-is.