Purchase domain names now for your business as well as for titles of your books. If your name is available, purchase it too!
Domain names are available from many online vendors. They are inexpensive (around $15 per year) and can be held until you need them. Do a quick Google search for ‘domain names’ and you will find many sites that not only sell domain names but offer web site hosting as well.
Whether you build your own web site or hire someone to build a site for you, your domain names will be ready when you are.
Best wishes, writers!