diff --git a/interim/source_strings.yaml b/interim/source_strings.yaml
index 62d7c49b..4aa850d4 100644
--- a/interim/source_strings.yaml
+++ b/interim/source_strings.yaml
@@ -647,6 +647,10 @@ en:
           removable: Removable Bollard
           # bollard=rising
           rising: Rising Bollard
+      books:
+        # books=*
+        label: Type of Books
+        terms: '[translate with synonyms or related terms for ''Type of Books'', separated by commas]'
       booth:
         # booth=*
         label: Booth