diff --git a/BUGs b/BUGs
index f096112..4aca7d4 100644
--- a/BUGs
+++ b/BUGs
@@ -1,9 +1,5 @@
 #### BUGS (next-46)
 
-BUG-41:     failed to add a book with 2 x same series - implement same fix as for duplicate authors (search for processed_bal) - should 
-            actually turn processed_bal into a function, as its used twice, then do similar for series
-
-BUG-42:     bug-7 removed as bug-41 covers the more useful version of this AND what we also need (this bug) is not allowing adding a 
-            sub_book_num for a series that has already been taken -- not sure the DB enforces either
+BUG-42:     can add a sub_book_num for a series that has already been taken (or is invalid, e.g. 9999) -- DB does not enforce either
 
 BUG-45:     create a new book, fail (say for now year), and it loses the series you already set in the new html
diff --git a/main.py b/main.py
index 3a2894a..3729b81 100644
--- a/main.py
+++ b/main.py
@@ -579,6 +579,36 @@ def RemoveDuplicateAuthorInForm( request ):
                 message="Removed duplicate Author!!!"
     return ret, message
 
+################################################################################
+# Go through request.form, find series and remove any that are duplicates as
+# that is not allowed / DB integrity issue.   This just sets a message that
+# will allow the book to be create/saved still, but the duplicate series will
+# be removed
+def RemoveDuplicateSeriesInForm( book, request ):
+    processed=[]
+    message=""
+
+    cnt=1
+    while f'bsl-book_id-{cnt}' in request.form:
+        print( f"cnt={cnt}, found series id = {request.form[f'bsl-series_id-{cnt}']} " )
+        if request.form[ f"bsl-series_id-{cnt}"] not in processed:
+            if book.IsParent():
+                newbsl=Book_Series_Link( book_id=book.id, series_id=request.form[f'bsl-series_id-{cnt}'] )
+            else:
+                newbsl=Book_Series_Link( book_id=book.id, series_id=request.form[f'bsl-series_id-{cnt}'], book_num=request.form[f'bsl-book_num-{cnt}'] )
+
+            # add the contains (null for book_num) bsl for the parent book
+            if book.IsChild():
+                parent_bsl=Book_Series_Link( book_id=book.parent[0].id, series_id=request.form[f'bsl-series_id-{cnt}'] )
+                db.session.add(parent_bsl)
+
+            db.session.add(newbsl)
+            processed.append( request.form[ f"bsl-series_id-{cnt}"] )
+        else:
+            message="Removed duplicate Series!!!"
+        cnt += 1
+    db.session.commit()
+    return message
 
 ################################################################################
 # /book -> GET/POST -> creates a new book and when created, takes you back to
@@ -656,20 +686,13 @@ def new_book():
                         newbsl=Book_Series_Link( book_id=book.id, series_id=s.series_id, book_num=max_bn+1 )
                         db.session.add(newbsl)
                 db.session.commit()
+            message=RemoveDuplicateSeriesInForm( book, request )
             if message == "":
                 st.SetMessage( "Created new Book ({})".format(book.title) )
             else:
                 st.SetAlert("warning")
                 st.SetMessage( f"Created new Book ({book.title})<br>BUT {message}" )
                 
-            cnt=1
-            for field in request.form:
-                if 'bsl-book_id-' in field and field != 'bsl-book_id-NUM':
-                    cnt=int(re.findall( '\d+', field )[0])
-                    newbsl=Book_Series_Link( book_id=book.id, series_id=request.form[ f"bsl-series_id-{cnt}"], book_num=request.form[ f"bsl-book_num-{cnt}"] )
-                    db.session.add(newbsl)
-                    db.session.commit()
-                    cnt=cnt+1
             return redirect( '/book/{}'.format(book.id) )
         else:
             alert="danger"
@@ -815,22 +838,23 @@ def book(id):
                 if book.IsChild():
                     Book_Series_Link.query.filter(Book_Series_Link.book_id == book.parent[0].id ).delete()
 
-                cnt=1
-                for field in request.form:
-                    if 'bsl-book_id-' in field and field != 'bsl-book_id-NUM':
-                        cnt=int(re.findall( '\d+', field )[0])
-                        if book.IsParent():
-                            newbsl=Book_Series_Link( book_id=request.form[f'bsl-book_id-{cnt}'],
-                                series_id=request.form[f'bsl-series_id-{cnt}'] )
-                        else:
-                            newbsl=Book_Series_Link( book_id=request.form[f'bsl-book_id-{cnt}'],
-                                series_id=request.form[f'bsl-series_id-{cnt}'], 
-                                book_num=request.form[f'bsl-book_num-{cnt}'] )
-                            # add the contains (null for book_num) bsl for the parent book
-                            if book.IsChild():
-                                parent_bsl=Book_Series_Link( book_id=book.parent[0].id, series_id=request.form[f'bsl-series_id-{cnt}'] )
-                                db.session.add(parent_bsl)
-                        db.session.add(newbsl)
+#                cnt=1
+#                for field in request.form:
+#                    if 'bsl-book_id-' in field and field != 'bsl-book_id-NUM':
+#                        cnt=int(re.findall( '\d+', field )[0])
+#                        if book.IsParent():
+#                            newbsl=Book_Series_Link( book_id=request.form[f'bsl-book_id-{cnt}'],
+#                                series_id=request.form[f'bsl-series_id-{cnt}'] )
+#                        else:
+#                            newbsl=Book_Series_Link( book_id=request.form[f'bsl-book_id-{cnt}'],
+#                                series_id=request.form[f'bsl-series_id-{cnt}'], 
+#                                book_num=request.form[f'bsl-book_num-{cnt}'] )
+#                            # add the contains (null for book_num) bsl for the parent book
+#                            if book.IsChild():
+#                                parent_bsl=Book_Series_Link( book_id=book.parent[0].id, series_id=request.form[f'bsl-series_id-{cnt}'] )
+#                                db.session.add(parent_bsl)
+#                        db.session.add(newbsl)
+            message=RemoveDuplicateSeriesInForm( book, request )
             db.session.commit()
 
             # reset rating on this/these series as the book has changed (and maybe the rating has changed)