diff --git a/core/modules/book/book.services.yml b/core/modules/book/book.services.yml
index 9aeda19..1e0e702 100644
--- a/core/modules/book/book.services.yml
+++ b/core/modules/book/book.services.yml
@@ -6,7 +6,7 @@ services:
       - { name: breadcrumb_builder, priority: 701 }
   book.manager:
     class: Drupal\book\BookManager
-    arguments: ['@entity.manager', '@string_translation', '@config.factory', '@book.outline_storage']
+    arguments: ['@entity.manager', '@string_translation', '@config.factory', '@book.outline_storage', '@current_user']
   book.outline:
     class: Drupal\book\BookOutline
     arguments: ['@book.manager']
diff --git a/core/modules/book/src/BookManager.php b/core/modules/book/src/BookManager.php
index bd042b9..0573b13 100644
--- a/core/modules/book/src/BookManager.php
+++ b/core/modules/book/src/BookManager.php
@@ -64,13 +64,25 @@ class BookManager implements BookManagerInterface {
   protected $bookTreeFlattened;
 
   /**
+   * The curent user.
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $account;
+
+  /**
    * Constructs a BookManager object.
+   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $translation
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   * @param \Drupal\book\BookOutlineStorageInterface $book_outline_storage
+   * @param \Drupal\book\AcocuntInterface $account
    */
-  public function __construct(EntityManagerInterface $entity_manager, TranslationInterface $translation, ConfigFactoryInterface $config_factory, BookOutlineStorageInterface $book_outline_storage) {
+  public function __construct(EntityManagerInterface $entity_manager, TranslationInterface $translation, ConfigFactoryInterface $config_factory, BookOutlineStorageInterface $book_outline_storage, AccountInterface $account) {
     $this->entityManager = $entity_manager;
     $this->stringTranslation = $translation;
     $this->configFactory = $config_factory;
     $this->bookOutlineStorage = $book_outline_storage;
+    $this->account = $account;
   }
 
   /**
@@ -688,14 +700,14 @@ protected function flatBookTree(array $tree, array &$flat) {
    */
   public function loadBookLink($nid, $translate = TRUE) {
     $node = $this->entityManager->getStorage('node')->load($nid);
-    $links = $this->loadBookLinks([$node], $translate);
+    $links = $this->loadBookLinks([$node->id() => $node], $translate);
     return isset($links[$nid]) ? $links[$nid] : FALSE;
   }
 
   /**
    * {@inheritdoc}
    */
-  public function loadBookLinks($nodes, $translate = TRUE) {
+  public function loadBookLinks(array $nodes, $translate = TRUE) {
     $result = $this->bookOutlineStorage->loadMultiple(array_keys($nodes), $translate);
     $links = array();
     foreach ($result as $link) {
diff --git a/core/modules/book/src/BookManagerInterface.php b/core/modules/book/src/BookManagerInterface.php
index cf11265..6f68683 100644
--- a/core/modules/book/src/BookManagerInterface.php
+++ b/core/modules/book/src/BookManagerInterface.php
@@ -79,7 +79,7 @@ public function loadBookLink($nid, $translate = TRUE);
    * @return array[]
    *   The book data of each node keyed by NID.
    */
-  public function loadBookLinks($nodes, $translate = TRUE);
+  public function loadBookLinks(array $nodes, $translate = TRUE);
 
   /**
    * Returns an array of book pages in table of contents order.