Redirect custom post types that are defined to the home page before running any DB queries or anything.

redirect-cpt-to-home.php

<?php

/**
 * Hook in to the parse_request action to see if any custom post type
 * variables are present. If so, redirect.
 **/
function redirect_cpt_to_home($wp) {
	$redirectable = array('book', 'movie', 'event');
	
	if(in_array($wp->query_vars['post_type'], $redirectable)) {
		wp_redirect(home_url('/'));
		exit;
	}
}
add_action('parse_request', 'redirect_cpt_to_home');