How To Change the Default “Add To Cart” Button Text in WooCommerce

// Disable search in WordPress - More snippets at wpunplugged.com 

add_filter(\'woocommerce_product_single_add_to_cart_text\', \'woo_custom_cart_button_text\');
 
function woo_custom_cart_button_text() {
return __(\'Book Now\', \'woocommerce\');
}