code: def assemble_tlg_author_filepaths():
      
      plaintext_dir_rel = '~/cltk_data/greek/text/tlg/plaintext/'
      plaintext_dir = os.path.expanduser(plaintext_dir_rel)
      filepaths = [os.path.join(plaintext_dir, x + '.TXT') for x in TLG_INDEX]
      return filepaths
docs: Reads TLG index and builds a list of absolute filepaths.