The paper on the left corner of the frame is BOH (blow out highlights,its when the light is so strong that you loose detail).You should diffuse it with a piece of paper or a sheet or something!
I like the mood but i believe that you can do better!!!
You should all so include the whole spiral of the book or nothing at all!
Just some suggestions (imho).

Thank you very much Karaflazz. I actually blew out the top left corner on purpose to add effect to the image, and the bindings were meant to add a compositional value in that empty space up the top, with no points of interest. I do understand your comments of course and thanks for taking the time to write these tips for me.

I did my best!

and, imo, choose your dof (depth of field) a little more carefully, it is a little oof (out of focus) around the pen itself.