if book.root_ancestor not in already and 'epub' in formats and book.root_ancestor.epub_file:
filename = book.root_ancestor.epub_file.path
archive.write(filename, str('%s.epub' % book.root_ancestor.slug))
if book.root_ancestor not in already and 'epub' in formats and book.root_ancestor.epub_file:
filename = book.root_ancestor.epub_file.path
archive.write(filename, str('%s.epub' % book.root_ancestor.slug))