nice work, tho ther are some anatomy problems in this one.
i think that her breasts are way too wide for a normal body type (unless they are pressed by the spell-book), (and they had an odd shape, but if its from the book being pressed onto them, then it's ok.)
and the waist is also very wide for her body. i might say that her eyes are a bit too far from each-other
nice picture, i just think that your other drawings are alot better than this in anatomy-speaking.
dont worry about my comment, i just want to help out :D
keep it up man, you are very good!