6 string references to 'Book' in Drupal 8

book.info.yml in core/modules/book/book.info.yml

core/modules/book/book.info.yml

BookController::adminOverview in core/modules/book/src/Controller/BookController.php

Returns an administrative overview of all books.

BookJavascriptTest::testBookOrdering in core/modules/book/tests/src/FunctionalJavascript/BookJavascriptTest.php

Tests re-ordering of books.

BookManager::addFormElements in core/modules/book/src/BookManager.php

Builds the common elements of the book form for the node and outline forms.

book_views_data in core/modules/book/book.views.inc

Implements hook_views_data().

views.view.test_book_view.yml in core/modules/book/tests/modules/book_test_views/test_views/views.view.test_book_view.yml

core/modules/book/tests/modules/book_test_views/test_views/views.view.test_book_view.yml