'created page', 'page_update' => 'updated page', 'page_delete' => 'deleted page', 'page_restore' => 'restored page', // Chapters 'chapter_create' => 'created chapter', 'chapter_update' => 'updated chapter', 'chapter_delete' => 'deleted chapter', // Books 'book_create' => 'created book', 'book_update' => 'updated book', 'book_delete' => 'deleted book', ];