bound_cover = cover(book_info, width=1200)
root.set('data-cover-width', str(bound_cover.width))
root.set('data-cover-height', str(bound_cover.height))
bound_cover = cover(book_info, width=1200)
root.set('data-cover-width', str(bound_cover.width))
root.set('data-cover-height', str(bound_cover.height))