Profile: liatG

function n_level_term_id_func($atts) {
  $a = shortcode_atts( array(
      'n' => '0'
  ), $atts );
  $id = 0;
  $current_taxonomy = isset(get_queried_object()->taxonomy) ? get_queried_object()->taxonomy : null;
  if( $current_taxonomy == 'book-tax' ) {
    $ancestors = get_ancestors( get_queried_object()->term_id, $current_taxonomy );
    $count = count( $ancestors );
    $id = isset( $ancestors[ $count - $a['n'] ] ) ? $ancestors[ $count - $a['n']] : get_queried_object()->term_id;
  }
  return $id;
}
add_shortcode("n-level-term-id", "n_level_term_id_func");

[wpv-view name="your-view-slug" terms="[n-level-term-id n='2']"]