diff --git a/core/opds_import.py b/core/opds_import.py
index 03a46929c..90b51ea0d 100644
--- a/core/opds_import.py
+++ b/core/opds_import.py
@@ -1958,20 +1958,29 @@ def _get_feeds(self) -> Iterable[tuple[str, bytes]]:
         return reversed(feeds)
 
     def run_once(self, progress: TimestampData) -> TimestampData:
+        """
+        Import all books in a feed.
+
+        :param progress: A TimestampData object indicating the start time of the run.
+        :return: A new TimestampData object with an achievements field
+            containing details of the operation.
+        """
         feeds = self._get_feeds()
         total_imported = 0
         total_failures = 0
+        failure_summary = []
 
         for link, feed in feeds:
             self.log.info("Importing next feed: %s", link)
             imported_editions, failures = self.import_one_feed(feed)
             total_imported += len(imported_editions)
             total_failures += len(failures)
+            for failure_id, failure_details in failures.items():
+                failure_summary.append(f"ISBN: {failure_id}: {failure_details}")
             self._db.commit()
-
-        achievements = "Items imported: %d. Failures: %d." % (
-            total_imported,
-            total_failures,
+        achievements = (
+            "Items imported: %d. Failures: %d.\nFailed IDs and details:\n%s"
+            % (total_imported, total_failures, "\n".join(failure_summary))
         )
 
         return TimestampData(achievements=achievements)
diff --git a/tests/core/test_opds_import.py b/tests/core/test_opds_import.py
index 3e1c2626d..5710dd04a 100644
--- a/tests/core/test_opds_import.py
+++ b/tests/core/test_opds_import.py
@@ -1948,7 +1948,7 @@ def test_import_one_feed(self, opds_importer_fixture: OPDSImporterFixture):
             collection=collection,
         )
         assert "Utter failure!" in failure.exception
-
+        print(failures)
         # Both failures were reported in the return value from
         # import_one_feed
         assert 2 == len(failures)
@@ -1992,7 +1992,9 @@ def import_one_feed(self, feed):
         assert ["last page", "second page", "first page"] == monitor.imports
 
         # Every page of the import had two successes and one failure.
-        assert "Items imported: 6. Failures: 3." == progress.achievements
+        assert (
+            "Items imported: 6. Failures: 3.\nFailed IDs and details:\nISBN: identifier: Failure\nISBN: identifier: Failure\nISBN: identifier: Failure"
+        ) == progress.achievements
 
         # The TimestampData returned by run_once does not include any
         # timing information; that's provided by run().