Possible WP_query()?

Is there any way to display more articles by the co-author within author bio box?

This is my code:

$coauthors = get_coauthors();
foreach( $coauthors as $coauthor ):
endforeach;

	$display = new WP_query();
	$display->query(array('showposts' => 5, 'author' => get_the_author_meta('ID'), 'orderby' => 'rand' ));
	global $wp_query; $wp_query->in_the_loop = true;
	if ($display->have_posts()) :

$author_box .= '<li class="read-also">'.__('Also Wrote','news').'</li>';
	while ($display->have_posts()) : $display->the_post();
	$author_box .= '<li><a href="'.get_permalink($post->ID).'">'.dt_get_posttype().get_the_title().'</a></li>';
	endwhile;
	wp_reset_query();
	$author_box .= '</ul>';
	$author_box .= '</div>';
	$content = $author_box.$content;
	return $content;

	endif;

I’m trying to get this to work from past few days but no luck.

Any help would be appreciated.

http://wordpress.org/extend/plugins/co-authors-plus/