"Read this guide before making or choosing your book cover.
"They say 'Don't judge a book by it's cover,' so it doesn't really matter
What complete rubbish! Getting a book cover right is vital because unless it catches the eye of someone looking for a book, they will never read the description, never read a sample and never make a purchase. If you are an indie author your cover will make a huge difference to your sales."
Read the rest of this very useful and very specific post by clicking on this link http://authorbookpromotion.blogspot.co.nz/
I recommend it!