diff --git a/core/lib/Drupal/Core/Entity/FieldableDatabaseStorageController.php b/core/lib/Drupal/Core/Entity/FieldableDatabaseStorageController.php
index eacbf53..ac2ab2e 100644
--- a/core/lib/Drupal/Core/Entity/FieldableDatabaseStorageController.php
+++ b/core/lib/Drupal/Core/Entity/FieldableDatabaseStorageController.php
@@ -197,7 +197,7 @@ public function loadMultiple(array $ids = NULL) {
 
     // Load remaining entities either from the persistent cache or storage.
     $entities = $this->doLoadMultiple($ids);
-
+    $this->invokeLoadUncachedHook($entities);
     $this->setStaticCache($entities);
 
     $entities += $entities_from_static_cache;
@@ -366,6 +366,27 @@ protected function setPersistentCache($entities) {
   }
 
   /**
+   * Invokes hook_entity_load_uncached().
+   *
+   * @param \Drupal\Core\Entity\EntityInterface[] $entities
+   *   List of entities, keyed on the entity ID.
+   */
+  protected function invokeLoadUncachedHook(array &$entities) {
+    if (!empty($entities)) {
+      // Call hook_entity_load_uncached().
+      foreach ($this->moduleHandler()->getImplementations('entity_load_uncached') as $module) {
+        $function = $module . '_entity_load_uncached';
+        $function($entities, $this->entityTypeId);
+      }
+      // Call hook_TYPE_load_uncached().
+      foreach ($this->moduleHandler()->getImplementations($this->entityTypeId . '_load_uncached') as $module) {
+        $function = $module . '_' . $this->entityTypeId . '_load_uncached';
+        $function($entities);
+      }
+    }
+  }
+
+  /**
    * {@inheritdoc}
    */
   public function resetCache(array $ids = NULL) {
diff --git a/core/modules/book/book.module b/core/modules/book/book.module
index 8fe9e41..cb753bd 100644
--- a/core/modules/book/book.module
+++ b/core/modules/book/book.module
@@ -455,9 +455,11 @@ function book_children($book_link) {
 }
 
 /**
- * Implements hook_node_load().
+ * Implements hook_node_load_uncached().
+ *
+ * @todo: Use hook_node_load() and clear caches when changes happen.
  */
-function book_node_load($nodes) {
+function book_node_load_uncached($nodes) {
   $result = db_query("SELECT * FROM {book} b INNER JOIN {menu_links} ml ON b.mlid = ml.mlid WHERE b.nid IN (:nids)", array(':nids' =>  array_keys($nodes)), array('fetch' => PDO::FETCH_ASSOC));
   foreach ($result as $record) {
     $nodes[$record['nid']]->book = $record;
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 6d7e051..ab8a5e0 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -880,11 +880,11 @@ function comment_translation_configuration_element_submit($form, &$form_state) {
 }
 
 /**
- * Implements hook_entity_load().
+ * Implements hook_entity_load_uncached().
  *
  * @see \Drupal\comment\Plugin\Field\FieldType\CommentItem::getPropertyDefinitions()
  */
-function comment_entity_load($entities, $entity_type) {
+function comment_entity_load_uncached($entities, $entity_type) {
   if (!\Drupal::service('comment.manager')->getFields($entity_type)) {
     // Do not query database when entity has no comment fields.
     return;
diff --git a/core/modules/node/tests/modules/node_access_test/node_access_test.module b/core/modules/node/tests/modules/node_access_test/node_access_test.module
index 128b31a..81259f3 100644
--- a/core/modules/node/tests/modules/node_access_test/node_access_test.module
+++ b/core/modules/node/tests/modules/node_access_test/node_access_test.module
@@ -107,9 +107,9 @@ function node_access_test_form_node_form_alter(&$form, $form_state) {
 }
 
 /**
- * Implements hook_node_load().
+ * Implements hook_ENTITY_TYPE_load_uncached().
  */
-function node_access_test_node_load($nodes) {
+function node_access_test_node_load_uncached($nodes) {
   $result = db_query('SELECT nid, private FROM {node_access_test} WHERE nid IN(:nids)', array(':nids' => array_keys($nodes)));
   foreach ($result as $record) {
     $nodes[$record->nid]->private = $record->private;
diff --git a/core/modules/system/entity.api.php b/core/modules/system/entity.api.php
index 1e37fff..91493a8 100644
--- a/core/modules/system/entity.api.php
+++ b/core/modules/system/entity.api.php
@@ -266,18 +266,55 @@ function hook_entity_create(\Drupal\Core\Entity\EntityInterface $entity) {
  * This is a generic load hook called for all entity types loaded via the
  * entity API.
  *
- * @param array $entities
+ * The hook will not be invoked for entities loaded from the cache. Use
+ * hook_entity_load_uncached() if necessary.
+ *
+ * @param \Drupal\Core\Entity\EntityInterface[] $entities
  *   The entities keyed by entity ID.
  * @param string $entity_type
  *   The type of entities being loaded (i.e. node, user, comment).
  */
-function hook_entity_load($entities, $entity_type) {
+function hook_entity_load(array $entities, $entity_type) {
   foreach ($entities as $entity) {
     $entity->foo = mymodule_add_something($entity);
   }
 }
 
 /**
+ * Act on entities when loaded from the storage or cache.
+ *
+ * Only use this hook if the result must not be cached.
+ *
+ * @param \Drupal\Core\Entity\EntityInterface[] $entities
+ *   The entities keyed by entity ID.
+ * @param string $entity_type
+ *   The type of entities being loaded (i.e. node, user, comment).
+ *
+ * @see hook_entity_load_uncached()
+ */
+function hook_entity_load_uncached(array $entities, $entity_type) {
+  foreach ($entities as $entity) {
+    $entity->foo = mymodule_add_something_uncached($entity);
+  }
+}
+
+/**
+ * Act on entities of the given type when loaded from the storage or cache.
+ *
+ * Only use this hook if the result must not be cached.
+ *
+ * @param \Drupal\Core\Entity\EntityInterface[] $entities
+ *   The entities keyed by entity ID.
+ *
+ * @see hook_entity_load_uncached()
+ */
+function hook_ENTITY_TYPE_load_uncached(array $entities) {
+  foreach ($entities as $entity) {
+    $entity->foo = mymodule_add_something_uncached($entity);
+  }
+}
+
+/**
  * Act on an entity before it is about to be created or updated.
  *
  * @param \Drupal\Core\Entity\EntityInterface $entity