public function get_list($id) {
        foreach (array(self::INDEX_LISTS, self::INDEX_LIST) as $k) {
            $key = $this->baseurl . '/' . $k . $id;
            if (isset($this->raw[$key])) {
                return new ReadingList($this->api, $this->baseurl, $id, $this->raw[$key]);
            }
        }

        return null;
    }