diff --git a/main.py b/main.py
index 741182d..113c4c6 100644
--- a/main.py
+++ b/main.py
@@ -665,8 +665,7 @@ def unrated_books():
     books = Book.query.join(Condition,Owned).filter(Rating.name=='Undefined',Owned.name=='Currently Owned').all()
     return render_template("books.html", books=books, page_title="Books with no rating", show_cols='Rating', hide_cols='' )
 
-@app.route("/missing_books", methods=["GET"])
-def missing_books():
+def FindMissingBooks():
     tmp = db.engine.execute("select s.*, count(bsl.book_num) from book_series_link bsl, series s where bsl.book_num is not null and s.id = bsl.series_id group by s.id order by s.title")
     books=[]
     sold=Owned.query.filter(Owned.name=='Sold').all()
@@ -680,6 +679,9 @@ def missing_books():
             # check to see if the only books in this series are SOLD, if so, there
             # are no missing books here, I clearly dont want more of this series
             for b in bsl:
+                print("b={}".format( b ) )
+                if b.book_num == None:
+                    continue
                 missing.remove( b.book_num )
                 tmp_book=Book.query.get(b.book_id)
                 if tmp_book.owned == sold[0].id:
@@ -689,6 +691,11 @@ def missing_books():
             else:
                 # turn missing from array into string, and strip 0 and last char (the square brackets)
                 books.append( { 'id': t.id, 'title': t.title, 'num_books': t.num_books, 'missing': str(missing)[1:-1] } )
+    return books
+
+@app.route("/missing_books", methods=["GET"])
+def missing_books():
+    books=FindMissingBooks()
     return render_template("missing.html", books=books )
 
 @app.route("/wishlist", methods=["GET"])