diff --git a/handler/FilesHandler.php b/handler/FilesHandler.php
index 9707ca5..ae1ee65 100644
--- a/handler/FilesHandler.php
+++ b/handler/FilesHandler.php
@@ -29,6 +29,10 @@ class FilesHandler extends request_handler {
         if (!$folder)
             not_found();
         $files = books_get($folder_id);
+        add_meta([
+            '$title' => lang('meta_files_book_folder_title', $folder->getTitle()),
+            '$description' => lang('meta_files_book_folder_description', $folder->getTitle())
+        ]);
         set_title(lang('files').' - '.$folder->title);
         render('files/folder',
             folder: $folder,
@@ -48,11 +52,6 @@ class FilesHandler extends request_handler {
         add_skin_strings([
             'files_search_results_count'
         ]);
-        if (!$folder_id && !$query)
-            add_meta([
-                '$title' => lang('meta_files_collection_title', lang('files_'.$collection->value.'_collection')),
-                '$description' => lang('meta_files_'.$collection->value.'_description')
-            ]);
 
         $vars = [];
         $text_excerpts = null;
@@ -136,6 +135,20 @@ class FilesHandler extends request_handler {
             $title .= ' - '.htmlescape($query);
         set_title($title);
 
+        if (!$folder_id && !$query)
+            add_meta([
+                '$title' => lang('4in1').' - '.lang('meta_files_collection_title', lang('files_'.$collection->value.'_collection')),
+                '$description' => lang('meta_files_'.$collection->value.'_description')
+            ]);
+        else if ($query || $parents) {
+            add_meta([
+                '$title' => lang('4in1').' - '.$title,
+                '$description' => lang('meta_files_'.($query ? 'search' : 'folder').'_description',
+                    $query ?: $parents[count($parents)-1]->getTitle(),
+                    lang('files_'.$collection->value.'_collection'))
+            ]);
+        }
+
         render('files/collection',
             ...$vars,
             collection: $collection,
diff --git a/strings/main.yaml b/strings/main.yaml
index 6850ee7..c4430b1 100644
--- a/strings/main.yaml
+++ b/strings/main.yaml
@@ -28,6 +28,10 @@ meta_files_title: "4in1 - Files"
 meta_files_description: "Large archive of files and documents that provide the evidentiary basis for the \"4in1\" investigation."
 
 meta_files_collection_title: "4in1 - %s"
+meta_files_book_folder_title: "4in1 - Files - %s"
+meta_files_book_folder_description: "\"%s\" directory in the 4in1 materials archive."
+meta_files_folder_description: "\"%s\" directory in the \"%s\" archive."
+meta_files_search_description: "Search results for \"%s\" in the \"%s\" archive."
 meta_files_wff_description: "Searchable archive of declassified NSA documents related to the career of William. F. Friedman. Over 52,000 pages in more than 7,500 files."
 meta_files_mdf_description: "Searchable archive of all Mercure de France issues of 1920-1940 period."
 meta_files_baconiana_description: "Searchable archive of Baconiana almanac."