book = models.ForeignKey(Book, null=True, blank=True,
help_text=_('Published book.'))
cover = models.ImageField(_('Cover'), upload_to = 'funding/covers')
book = models.ForeignKey(Book, null=True, blank=True,
help_text=_('Published book.'))
cover = models.ImageField(_('Cover'), upload_to = 'funding/covers')