For those of you who want to publish content which you can have printed but DO NOT want it visible in the Online Bookstore, then you can set a 'Public / Private' flag when you upload your book.
When set to Public it will be available in the store. When private it is only available to you. There is a further flag 'semi private' which allows you to decide who can see it - so chosen friends or members of your family.
A web site is part of what should be a complete set of 'visibility tools'. However relying solely on your own website will never bring the traffic and sales you desire.