COMPOSITION:
I'm not too sure about the 'busy' background with the different tones and brightness. Other than that I find it nicely setup :|
TECHNICAL:
Very nice focus, good use of DOF to blur out the 'distracting' bg. Nice soft lighting on the book...i like the shadows on the pages. :)
ARTISTIC:
This would make a cool shot to promote the book. I think you got the score you got because some people see this image as a 'copout' shot. I thinks it's really good :)