diff --git a/python/ebook_search/bm25_corpus.py b/python/ebook_search/bm25_corpus.py
index 79172a4..6c8a15d 100644
--- a/python/ebook_search/bm25_corpus.py
+++ b/python/ebook_search/bm25_corpus.py
@@ -172,13 +172,7 @@ def fetch_bm25_corpus_records(session: Session) -> list[dict[str, object]]:
             EbookSource.author.label("source_author"),
             EbookChapter.title.label("chapter_title"),
             EbookChunk.page_label.label("page_label"),
-            func.concat_ws(
-                " ",
-                EbookSource.title,
-                EbookSource.author,
-                EbookChapter.title,
-                EbookChunk.search_text,
-            ).label("bm25_text"),
+            EbookChunk.search_text.label("bm25_text"),
         )
         .select_from(EbookChunk)
         .join(EbookSource, EbookSource.id == EbookChunk.source_id)