I think it is just a little bit oversharpened. There are jpeg artifacts in it. Maybe you could've used Neat Image to smooth it out a little. Good idea and composition.
What's that in the upper right corner. The white balance also seems to be off here. I think the photo has also been overly sharpened, producing those nasty jaggies.
Looks like a lot of catching up to do. Your white balance appears off a bit. Would prefer not having that shadow. A solid black background might have been better. A tighter crop would have eliminated spot in the top right corner.
Think this composition has been done before, but you should have had the spine of the books facing the viewer. Also, appears to be a low resolution shot or jpeg artifacts present.
Looks like you have your work cut out for you. The lighting could stand to be a bit better in this shot, also I would have cropped out the distracting line in the top right corner of the shot. 4