diff --git a/core/modules/book/src/BookManager.php b/core/modules/book/src/BookManager.php
index 7341faa..e3504d9 100644
--- a/core/modules/book/src/BookManager.php
+++ b/core/modules/book/src/BookManager.php
@@ -59,7 +59,7 @@ class BookManager implements BookManagerInterface {
   /**
    * Book Storage.
    *
-   * @var \Drupal\book\BookStorageInteface
+   * @var \Drupal\book\BookStorageInterface
    */
   protected $bookStorage;
 
diff --git a/core/modules/book/src/BookStorage.php b/core/modules/book/src/BookStorage.php
index 1b61e17..621932c 100644
--- a/core/modules/book/src/BookStorage.php
+++ b/core/modules/book/src/BookStorage.php
@@ -22,7 +22,7 @@ class BookStorage implements BookStorageInterface {
   protected $connection;
 
   /**
-   * Constructs a BookManager object.
+   * Constructs a BookStorage object.
    */
   public function __construct(Connection $connection) {
     $this->connection = $connection;
diff --git a/core/modules/book/src/BookStorageInterface.php b/core/modules/book/src/BookStorageInterface.php
index 0a42a92..aa83c0d 100644
--- a/core/modules/book/src/BookStorageInterface.php
+++ b/core/modules/book/src/BookStorageInterface.php
@@ -115,7 +115,7 @@ public function update($nid, $fields);
   /**
    * Update the book id of the book link that it's beeing moved.
    *
-   * @param ing|string $bid
+   * @param int|string $bid
    *   The ID of the book whose children we move.
    * @param array $original
    *   The original parent of the book link.
@@ -123,7 +123,7 @@ public function update($nid, $fields);
    *   Array of expressions to be added to the query.
    * @param int $shift
    *   The difference in depth between the old and the new position of the
-   *   element beeing moved.
+   *   element being moved.
    *
    * @return mixed
    *   The number of rows matched by the update query.
diff --git a/core/modules/book/tests/src/BookManagerTest.php b/core/modules/book/tests/src/BookManagerTest.php
index 90315de..62d734b 100644
--- a/core/modules/book/tests/src/BookManagerTest.php
+++ b/core/modules/book/tests/src/BookManagerTest.php
@@ -58,7 +58,7 @@ class BookManagerTest extends UnitTestCase {
   /**
    * Book Storage.
    *
-   * @var \Drupal\book\BookStorageInteface
+   * @var \Drupal\book\BookStorageInterface
    */
   protected $bookStorage;