diff --git a/inc/admin/metaboxes/namespace.php b/inc/admin/metaboxes/namespace.php
index <HASH>..<HASH> 100644
--- a/inc/admin/metaboxes/namespace.php
+++ b/inc/admin/metaboxes/namespace.php
@@ -8,6 +8,7 @@ namespace Pressbooks\Admin\Metaboxes;
 
 use Pressbooks\Contributors;
 use Pressbooks\Licensing;
+use Pressbooks\Metadata;
 use PressbooksMix\Assets;
 
 /**
@@ -337,6 +338,22 @@ function add_meta_boxes() {
 		]
 	);
 
+	$meta = new Metadata();
+	$data = $meta->getMetaPostMetadata();
+	$source_url = ( $data['pb_is_based_on'] ) ?? false;
+
+	if ( $source_url ) {
+		x_add_metadata_field(
+			'pb_is_based_on', 'metadata', [
+				'group' => 'copyright',
+				'label' => __( 'Source Book URL', 'pressbooks' ),
+				'readonly' => true,
+				'description' => __( 'This book was cloned from a pre-existing book at the above URL. This information will be displayed on the webbook homepage.', 'pressbooks' ),
+			]
+		);
+
+	}
+
 	if ( $show_expanded_metadata ) {
 		x_add_metadata_field(
 			'pb_copyright_year', 'metadata', [
Show source book URL in Book Info (fix #<I>) (#<I>)

* Show source book URL in Book Info (fix #<I>)