reverted:
--- b/core/modules/book/migration_templates/d7_book.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-id: d7_book
-label: Books
-migration_tags:
-  - Drupal 7
-source:
-  plugin: book
-process:
-  nid: nid
-  'book/bid': bid
-  'book/weight': weight
-  'book/pid':
-    -
-      plugin: skip_on_empty
-      method: process
-      source: plid
-    -
-      plugin: migration
-      migration: d7_book
-destination:
-  plugin: book
-migration_dependencies:
-  required:
-    - d7_node
-    - d7_menu_links
reverted:
--- b/core/modules/book/migration_templates/d7_book_settings.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-id: d7_book_settings
-label: Drupal 7 book configuration
-migration_tags:
-  - Drupal 7
-source:
-  plugin: variable
-  variables:
-    - book_child_type
-    - book_block_mode
-    - book_allowed_types
-process:
-  child_type: book_child_type
-  'block/navigation/mode': book_block_mode
-  allowed_types: book_allowed_types
-destination:
-  plugin: config
-  config_name: book.settings
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/book/migrations/d7_book.yml
@@ -0,0 +1,24 @@
+id: d7_book
+label: Books
+migration_tags:
+  - Drupal 7
+source:
+  plugin: book
+process:
+  nid: nid
+  'book/bid': bid
+  'book/weight': weight
+  'book/pid':
+    -
+      plugin: skip_on_empty
+      method: process
+      source: plid
+    -
+      plugin: migration
+      migration: d7_book
+destination:
+  plugin: book
+migration_dependencies:
+  required:
+    - d7_node
+    - d7_menu_links
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/book/migrations/d7_book_settings.yml
@@ -0,0 +1,17 @@
+id: d7_book_settings
+label: Drupal 7 book configuration
+migration_tags:
+  - Drupal 7
+source:
+  plugin: variable
+  variables:
+    - book_child_type
+    - book_block_mode
+    - book_allowed_types
+process:
+  child_type: book_child_type
+  'block/navigation/mode': book_block_mode
+  allowed_types: book_allowed_types
+destination:
+  plugin: config
+  config_name: book.settings