docs: def _parse_authors(details):
      """
      Parse authors of the book.
  
      Args:
          details (obj): HTMLElement containing slice of the page with details.
  
      Returns:
          list: List of :class:`structures.Author` objects. Blank if no author \
                found.
      """
      authors = details.find(
          "tr",
          {"id": "ctl00_ContentPlaceHolder1_tblRowAutor"}
      )
  
      if not authors:
          return []  # book with unspecified authors
  
      # parse authors from HTML and convert them to Author objects
      author_list = []
      for author in authors[0].find("a"):
          author_obj = Author(author.getContent())
  
          if "href" in author.params:
              author_obj.URL = author.params["href"]
  
          author_list.append(author_obj)
  
      return author_list