As votes were rolling in, I was becoming more and more in love with #4, even though initially I had my heart set on #3. And if you hadn't noticed, the constellation creates an image of a baby to a mother's breast. Not very clear, but it doesn't have to be. Once you realize what it is, it's a nice surprise, and links very well to the premise of the book. BUT ... when the votes started dribbling, I counted them up:
#3 = 85
#4 = 28
That was a surprise.
I conferred with some close author friends about my dilemma. I really did love both of these for different reasons, but I had thought that #4 was going to be more commercial and attract more readers. I decided I needed votes from people who didn't know me. So I uploaded these two covers to PickFu, a great marketing analysis tool conducted in real time. The results were astounding:
#3 = 72% would pick up this book based on the cover alone.
#4 = 28% would pick up this book based on the cover alone.
You can see the results in detail here, along with voters' comments.