diff --git a/papis-marvin b/papis-marvin
index 2c6149c..93c470e 100755
--- a/papis-marvin
+++ b/papis-marvin
@@ -20,10 +20,9 @@ def main(fpath, db):
 
         csv = csv.DictReader(f)
 
-        title_strip_pattern = re.compile(r"([^\s\w]|_)+")
         note_file = ""
         for row in csv:
-            title_stripped = title_strip_pattern.sub("", row["Title"])
+            title_stripped = strip_book_title(row["Title"])
 
             # switch to next book
             if not is_same_book(row["Title"]):
@@ -96,6 +95,10 @@ def write_to_files(notes):
                             num_added += 1
                 print(f"Added {num_added} entries to it.")
 
+title_strip_pattern = re.compile(r"([^\s\w]|_)+")
+def strip_book_title(title) -> str:
+    return title_strip_pattern.sub("", title)
+
 
 if __name__ == "__main__":
     # use argument passed to command as file or default file here