identifier = self.slug_to_identifier(book.slug)
if isinstance(book, Book):
# setSpec = map(self.tag_to_setspec, book.tags.filter(category__in=self.TAG_CATEGORIES))
identifier = self.slug_to_identifier(book.slug)
if isinstance(book, Book):
# setSpec = map(self.tag_to_setspec, book.tags.filter(category__in=self.TAG_CATEGORIES))