Ah yes, I remember when you asked about the old cover.
I'd say the new one is a large improvement, it's way less impersonal, more intriguing, and simply, more looking like a book cover one could find in an actual library.
My preference goes for the green version, imo the soft green and the girl's skin are contrasting just the right way (the blue cover offers too much contrast and a bit of clash). The green version also has better title readability.