# File lib/amazon/search.rb, line 303
      def power_search(term, mode='books', heavy=HEAVY, page=1)

        url = "/onca/xml3?t=%s&PowerSearch=%s&mode=%s&f=xml" +
              "&type=%s&dev-t=%s&page=%"
        type = heavy ? 'heavy' : 'lite'
        term = url_encode(term)

        raise ModeError, 'mode must be books' unless mode == 'books'

        mode = localise_mode(mode)
        search(url % [@id, term, mode, type, @token, page])
      end