I thought writing the book was work. Holy cow promoting it and publishing it and then republishing it is work too. So of course now that my husband has seen a finished product he has decided to help me. I love the help I really do but it would have made my life easier if he would have been the research guru that he his now months ago. There are a few more new things he has learned and shared with me. For instance that free isbn number that CreateSpace gave me. I should not have taken it. I should have just gotten my own because now I have to retire my CreateSpace isbn and upload a whole new file and cover image and start from scratch in order to change my isbn. There was an article that suggested I drop my CS isbn and replace it with my own isbn and then I can print on demand through Create Space for online retailers and I can use Lightening for bookstore orders. I am sharing this information because I'm hoping my mistakes and trials and success will help someone else at some point.
So in a nutshell if you want to offer print on demand books and your goal is to see in bookstores you need your own ISBN.You are better off at Lightening. If you want to focus on online sales then the best place to be is Create Space but I would suggest getting your own number so if you want to do both you can. More than one ISBN is not a good idea because best seller lists are based on isbn tracking. Clear as mud?