The default WordPress RSS feed includes only the default post types but the custom post types are not included. The following quick WordPress code snippet will help you to include WordPress custom post types to your web site RSS feed.
Add the following snippets to your WordPress theme functions.php
file:
// Add links to rss feed function add_to_custom_feed($qv) { if (isset($qv['feed']) && !isset($qv['post_type'])) $qv['post_type'] = array('post', 'books', 'events'); return $qv; } add_filter('request', 'add_to_custom_feed');
Save the changed functions.php
and visit your your WordPress site RSS feed url. Notice that now your RSS Feed will include the posts from custom post types.