Do I need to have a completed book?
No; however, you should have a title, a blurb description, a cover, and a target publication date
Where can I get a cover?
Why isn't a domain registration included?
When you invest in a domain name, you wan’t to be the sole license holder. You don’t wan’t anyone controlling what you will invest time and money in. Can you imagine if you held the rights to the domain name of “Amazon.com” or “Google.com”.
A domain registration is inexpensive at about a dollar/month. You want exclusive control of that domain name.