How to customize Entry Meta conditionally in Genesis

functions.php

<?php
//* Do NOT include the opening php tag

add_filter( 'genesis_post_meta', 'sk_post_meta_filter' );
/**
 * Customize entry meta in entry footer
 *
 * Context: Archive page and Singular pages of 'books' CPT.
 *
 * @author Sridhar Katakam
 * @link   http://sridharkatakam.com/
 */
function sk_post_meta_filter( $post_meta ) {
	if ( is_post_type_archive( 'books' ) || is_singular( 'books' ) ) {
		$post_meta = '[post_categories before="Posted Under: "] [post_tags before="Tags: "]';
	}

	return $post_meta;
}