Profile: fastrezS

$args = array(
  'post_type' => 'book-rfg',
  'numberposts' => -1,
  'toolset_relationships' => array(
    'role' => 'child',
    'related_to' => 12345,
    'relationship' => 'book-rfg'
  ),
);
$the_query = new WP_Query( $args );
while ( $the_query->have_posts() ){
  $the_query->the_post();
  the_title();
  echo '<br />';
}