I want to take this moment to wish each and every one of you a blessed and joyous 2018. May God richly bless you, guide you, and use you for His glory!
Side note: Reviews are not just for the purpose of marketing. They also shed light on potential or existing problems that need correcting.
It is important to remember that there are criteria to be followed regarding any pictures you include within the book’s interior. Create Space has their requirements and other publishing houses have theirs. They may not all be the same, so be sure to find out what is required and what is acceptable. Then make sure you meet them. If you don’t the book may be rejected, requiring you to bring the picture up to snuff.
The consensus opinion is that you need to have your book copyrighted. Now the truth is that the moment you create the work it is considered copyrighted. This means that you can include a copyright designation in your book (example: copyright © 2017).
You can also file with the government to get the book copyrighted.