I agree 100 percent. This is one of the best book cover illustrations I've seen in a very, very long time. This instantly draws me in--if I saw this on a shelf, I'd pick it up and check the book out for sure.
Very nice! The pose is awesome and her expression is just as nice. You did a wonderful job on the girl all around even down to the nitty gritty details of her strands of hair and the folds in her boots. I am impressed! The background holds its own as well! Very nicely done.