diff --git src/wp-content/themes/twentyseventeen/functions.php src/wp-content/themes/twentyseventeen/functions.php
index faf317f476..d0020ba93b 100644
--- src/wp-content/themes/twentyseventeen/functions.php
+++ src/wp-content/themes/twentyseventeen/functions.php
@@ -143,6 +143,10 @@ function twentyseventeen_setup() {
 			'homepage-section' => array(
 				'thumbnail' => '{{image-espresso}}',
 			),
+			'best_book' => array(
+				'post_type' => 'book',
+				'post_title' => 'Amazing',
+			),
 		),
 
 		// Create the custom image attachments used as post thumbnails for pages.
@@ -186,6 +190,11 @@ function twentyseventeen_setup() {
 					'page_about',
 					'page_blog',
 					'page_contact',
+					array(
+						'type' => 'post_type',
+						'object' => 'book',
+						'object_id' => '{{best_book}}',
+					)
 				),
 			),