Yes.  You retain ownership rights for anything you contribute to Cellucidate.  However by accepting Cellucidate's Terms & Conditions, you grant us permission to do what we need to do with your contributions in the context of different aspects of Cellucidate's functionality.  For example, we are able to store and back up information.  Also, when you choose to share contributions on Cellucidate - with other specific users, with the whole Cellucidate community or with the world at large - then we are able to do that.  The attribution features within Cellucidate will keep track of who creates, alters or copies cBook content using Cellucidate functionality.