diff --git a/core/modules/book/book.routing.yml b/core/modules/book/book.routing.yml
index 0b0f2a6..69ba077 100644
--- a/core/modules/book/book.routing.yml
+++ b/core/modules/book/book.routing.yml
@@ -23,6 +23,8 @@ book_export:
   pattern: '/book/export/{type}/{node}'
   defaults:
     _content: '\Drupal\book\Controller\BookController::bookExport'
+  options:
+    _access_mode: 'ALL'
   requirements:
     _permission: 'access printer-friendly version'
     _entity_access: 'node.view'
diff --git a/core/modules/book/lib/Drupal/book/BookExport.php b/core/modules/book/lib/Drupal/book/BookExport.php
index 39117bd..8b367f7 100644
--- a/core/modules/book/lib/Drupal/book/BookExport.php
+++ b/core/modules/book/lib/Drupal/book/BookExport.php
@@ -59,7 +59,9 @@ public function __construct(EntityManager $entityManager) {
    * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
    *   Thrown when the node was not attached to a book.
    *
-   * @return string A string containing HTML representing the node and its children in
+   * @return array
+   *   A render array representing the HTML for a node and its children in the
+   *   book hierarchy.
    */
   public function bookExportHtml(NodeInterface $node) {
     if (!isset($node->book)) {
@@ -117,10 +119,10 @@ protected function exportTraverse(array $tree, $callable) {
    *   (optional) All the rendered child nodes within the current node. Defaults
    *   to an empty string.
    *
-   * @return string
-   *   The HTML generated for the given node.
+   * @return array
+   *   A render array for the exported HTML of a given node.
    *
-   * @see book_export_traverse()
+   * @see \Drupal\book\BookExport::exportTraverse()
    */
   protected function bookNodeExport(NodeInterface $node, $children = '') {
     $build = $this->nodeRender->view($node, 'print', NULL);
diff --git a/core/modules/book/lib/Drupal/book/Controller/BookController.php b/core/modules/book/lib/Drupal/book/Controller/BookController.php
index 2c5248c..63ab802 100644
--- a/core/modules/book/lib/Drupal/book/Controller/BookController.php
+++ b/core/modules/book/lib/Drupal/book/Controller/BookController.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file
  * Contains \Drupal\book\Controller\BookController.
@@ -7,14 +8,12 @@
 namespace Drupal\book\Controller;
 
 use Drupal\Core\Controller\ControllerInterface;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
-use Drupal\Component\Utility\Unicode;
-
-use Drupal\node\NodeInterface;
 use Drupal\book\BookManager;
 use Drupal\book\BookExport;
+use Drupal\node\NodeInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Controller routines for book routes.
@@ -22,28 +21,26 @@
 class BookController implements ControllerInterface {
 
   /**
-   * Book Manager Service.
+   * The book manager.
    *
    * @var \Drupal\book\BookManager
    */
   protected $bookManager;
 
   /**
-   * Book Export Service.
+   * The book export service.
    *
    * @var \Drupal\book\BookExport
    */
   protected $bookExport;
 
   /**
-   * Injects BookManager Service.
-   */
-  public static function create(ContainerInterface $container) {
-    return new static($container->get('book.manager'), $container->get('book.export'));
-  }
-
-  /**
    * Constructs a BookController object.
+   *
+   * @param \Drupal\book\BookManager $bookManager
+   *   The book manager.
+   * @param \Drupal\book\BookExport $bookExport
+   *   The book export service.
    */
   public function __construct(BookManager $bookManager, BookExport $bookExport) {
     $this->bookManager = $bookManager;
@@ -51,6 +48,16 @@ public function __construct(BookManager $bookManager, BookExport $bookExport) {
   }
 
   /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('book.manager'),
+      $container->get('book.export')
+    );
+  }
+
+  /**
    * Returns an administrative overview of all books.
    *
    * @return string
@@ -61,7 +68,6 @@ public function adminOverview() {
     $rows = array();
 
     $headers = array(t('Book'), t('Operations'));
-
     // Add any recognized books to the table list.
     foreach ($this->bookManager->getAllBooks() as $book) {
       $row = array(
@@ -80,8 +86,12 @@ public function adminOverview() {
       );
       $rows[] = $row;
     }
-    $table = array('#theme' => 'table', '#header' => $headers, '#rows' => $rows, '#empty' => t('No books available.'));
-    return drupal_render($table);
+    return array(
+      '#theme' => 'table',
+      '#header' => $headers,
+      '#rows' => $rows,
+      '#empty' => t('No books available.'),
+    );
   }
 
   /**
@@ -95,17 +105,19 @@ public function bookRender() {
     foreach ($this->bookManager->getAllBooks() as $book) {
       $book_list[] = l($book['title'], $book['href'], $book['options']);
     }
-    $item_list = array('#theme' => 'item_list' , '#items' => $book_list);
-    return drupal_render($item_list);
+    return array(
+      '#theme' => 'item_list',
+      '#items' => $book_list,
+    );
   }
 
   /**
    * Generates representations of a book page and its children.
    *
-   * The function delegates the generation of output to helper functions. The
-   * function name is derived by prepending 'book_export_' to the given output
-   * type. So, e.g., a type of 'html' results in a call to the function
-   * book_export_html().
+   * The method delegates the generation of output to helper methods. The method
+   * name is derived by prepending 'bookExport' to the camelized form of given
+   * output type. For example, a type of 'html' results in a call to the method
+   * bookExportHtml().
    *
    * @param string $type
    *   A string encoding the type of output requested. The following types are
@@ -115,24 +127,22 @@ public function bookRender() {
    * @param \Drupal\node\NodeInterface $node
    *   The node to export.
    *
-   * @return \Symfony\Component\HttpFoundation\Response
-   *   A string representing the node and its children in the book hierarchy in a
-   *   format determined by the $type parameter.
+   * @return array
+   *   A render array representing the node and its children in the book
+   *   hierarchy in a format determined by the $type parameter.
    *
    * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
    */
   public function bookExport($type, NodeInterface $node) {
-    $type = Unicode::strtolower($type);
+    $method = 'bookExport' . Container::camelize($type);
 
     // @todo Convert the custom export functionality to serializer.
-    $book_export_service = $this->bookExport;
-    $method = 'bookExport' . $type;
-    if (!method_exists($book_export_service, $method)) {
+    if (!method_exists($this->bookExport, $method)) {
       drupal_set_message(t('Unknown export format.'));
       throw new NotFoundHttpException();
     }
 
-    return new Response($book_export_service->{$method}($node));
+    return $this->bookExport->{$method}($node);
   }
 
 }
diff --git a/core/modules/node/lib/Drupal/node/NodeBCDecorator.php b/core/modules/node/lib/Drupal/node/NodeBCDecorator.php
index 77694fc..885a546 100644
--- a/core/modules/node/lib/Drupal/node/NodeBCDecorator.php
+++ b/core/modules/node/lib/Drupal/node/NodeBCDecorator.php
@@ -15,6 +15,13 @@
 class NodeBCDecorator extends EntityBCDecorator implements NodeInterface {
 
   /**
+   * The NodeInterface object being decorated.
+   *
+   * @var \Drupal\node\NodeInterface
+   */
+  protected $decorated;
+
+  /**
    * {@inheritdoc}
    */
   public function setTitle($title) {
@@ -132,4 +139,11 @@ public function setRevisionAuthorId($uid) {
     return $this->decorated->setRevisionAuthorId($uid);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function prepareLangcode() {
+    return $this->decorated->prepareLangcode();
+  }
+
 }
diff --git a/core/modules/node/lib/Drupal/node/NodeInterface.php b/core/modules/node/lib/Drupal/node/NodeInterface.php
index 61e60a5..ffb9144 100644
--- a/core/modules/node/lib/Drupal/node/NodeInterface.php
+++ b/core/modules/node/lib/Drupal/node/NodeInterface.php
@@ -177,4 +177,12 @@ public function getRevisionAuthor();
    */
   public function setRevisionAuthorId($uid);
 
+  /**
+   * Prepares the langcode for a node.
+   *
+   * @return string
+   *   The langcode for this node.
+   */
+  public function prepareLangcode();
+
 }
diff --git a/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php b/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
index 6572ba9..a3cda94 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
@@ -11,6 +11,8 @@
 use Drupal\Core\Entity\EntityStorageControllerInterface;
 use Drupal\Core\Entity\Annotation\EntityType;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Language\Language;
+use Drupal\Core\Session\AccountInterface;
 use Drupal\node\NodeInterface;
 use Drupal\node\NodeBCDecorator;
 
@@ -145,6 +147,39 @@ public static function preDelete(EntityStorageControllerInterface $storage_contr
   /**
    * {@inheritdoc}
    */
+  public function access($operation = 'view', AccountInterface $account = NULL) {
+    if ($operation == 'create') {
+      return parent::access($operation, $account);
+    }
+
+    return \Drupal::entityManager()
+      ->getAccessController($this->entityType)
+      ->access($this, $operation, $this->prepareLangcode(), $account);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function prepareLangcode() {
+    $langcode = $this->language()->id;
+    // If the Language module is enabled, try to use the language from content
+    // negotiation.
+    if (\Drupal::moduleHandler()->moduleExists('language')) {
+      // Load languages the node exists in.
+      $node_translations = $this->getTranslationLanguages();
+      // Load the language from content negotiation.
+      $content_negotiation_langcode = \Drupal::languageManager()->getLanguage(Language::TYPE_CONTENT)->id;
+      // If there is a translation available, use it.
+      if (isset($node_translations[$content_negotiation_langcode])) {
+        $langcode = $content_negotiation_langcode;
+      }
+    }
+    return $langcode;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function setTitle($title) {
     $this->set('title', $title);
     return $this;
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 5a6d53a..5c53b54 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -2045,19 +2045,7 @@ function node_access($op, $node, $account = NULL, $langcode = NULL) {
 
   // If no language code was provided, default to the node's langcode.
   if (empty($langcode)) {
-    $langcode = $node->language()->id;
-    // If the Language module is enabled, try to use the language from content
-    // negotiation.
-    if (module_exists('language')) {
-      // Load languages the node exists in.
-      $node_translations = $node->getTranslationLanguages();
-      // Load the language from content negotiation.
-      $content_negotiation_langcode = language(Language::TYPE_CONTENT)->id;
-      // If there is a translation available, use it.
-      if (isset($node_translations[$content_negotiation_langcode])) {
-        $langcode = $content_negotiation_langcode;
-      }
-    }
+    $langcode = $node->prepareLangcode();
   }
   return $access_controller->access($node, $op, $langcode, $account);
 }