diff --git a/BUGs b/BUGs
index 21ad650..4b27d0c 100644
--- a/BUGs
+++ b/BUGs
@@ -7,3 +7,4 @@ BUG-45:     create a new book, fail (say for now year), and it loses the series
 BUG-46:     search (and really all books.html usage), don't deal with sub books and/or series ordering.  Probably should at least do subs ordering 
             (so the code I wrote for author/<id>/books) and use that for search for example
                 - test with search for 'dune'
+                - also test with authors book list for frank herbert
diff --git a/TODO b/TODO
index 3234f77..8c343f0 100644
--- a/TODO
+++ b/TODO
@@ -1,6 +1,4 @@
 TODO:
-    * book.parent is an array, not a dict - should change it over
-
     * search on more than title, e.g. author, series, etc.
 
     * if we add a new parent book with sub-books into a series, with parent * book as 'null' sub_book_num, all the sub_books should be added somehow into series - but cant input numbering on parent book, so
diff --git a/author.py b/author.py
index 10fcdb8..9609f4c 100644
--- a/author.py
+++ b/author.py
@@ -122,13 +122,13 @@ def authors_books(author_id):
                     ordered_books.append( tmp )
                     processed.append( bb.sub_book_id )
             elif b.IsChild():
-                ordered_books.append(b.parent[0])
-                processed.append( b.parent[0].id )
+                ordered_books.append(b.parent)
+                processed.append( b.parent.id )
                 cnt=1
-                for bb in b.parent[0].child_ref:
+                for bb in b.parent.child_ref:
                     tmp=Book.query.get(bb.sub_book_id)
                     # need to set parent_id and sub_book_num for indenting to work in html
-                    tmp.parent_id=b.parent[0].id
+                    tmp.parent_id=b.parent.id
                     tmp.sub_book_num=cnt
                     ordered_books.append( tmp )
                     processed.append( bb.sub_book_id )
diff --git a/main.py b/main.py
index 5c3ede9..fc209b8 100644
--- a/main.py
+++ b/main.py
@@ -152,7 +152,7 @@ class Book(db.Model):
     modified = db.Column(db.DateTime)
 
     # take actual parent book as there is no real associated sub_book_num data and can just use it
-    parent = db.relationship('Book', secondary=Book_Sub_Book_Link.__table__, primaryjoin="Book.id==Book_Sub_Book_Link.sub_book_id", secondaryjoin="Book.id==Book_Sub_Book_Link.book_id" )
+    parent = db.relationship('Book', secondary=Book_Sub_Book_Link.__table__, primaryjoin="Book.id==Book_Sub_Book_Link.sub_book_id", secondaryjoin="Book.id==Book_Sub_Book_Link.book_id", uselist=False )
     # but use child_ref as sub_book_num is per book, and I can't connect an empty array of sub_book_nums to a child book array in "child"
     child_ref = db.relationship('Book_Sub_Book_Link', secondary=Book_Sub_Book_Link.__table__, primaryjoin="Book.id==Book_Sub_Book_Link.book_id", secondaryjoin="Book.id==Book_Sub_Book_Link.sub_book_id", order_by="Book_Sub_Book_Link.sub_book_num", overlaps="parent" )
 
@@ -166,7 +166,7 @@ class Book(db.Model):
             return False
 
     def IsChild(self):
-        if len(self.parent):
+        if self.parent:
             return True
         else:
             return False
@@ -444,7 +444,7 @@ def CalcMoveForBookInSeries( id, bid, dir ):
 
         # if book2 is a sub book, then we need its parent as book2 instead, as we have to move the whole book as one
         if book2.IsChild():
-           book2 = Book.query.get( book2.parent[0].id )
+           book2 = Book.query.get( book2.parent.id )
 
         # By here: book1 is parent or normal book we are swapping with book2 which is parent or normal book
         b1_numsb = book1.NumSubBooks()
@@ -598,7 +598,7 @@ def RemoveDuplicateSeriesInForm( book, request ):
 
             # 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}'] )
+                parent_bsl=Book_Series_Link( book_id=book.parent.id, series_id=request.form[f'bsl-series_id-{cnt}'] )
                 db.session.add(parent_bsl)
 
             db.session.add(newbsl)
@@ -735,7 +735,7 @@ def DeleteBook(id):
         st.SetMessage("Deleted {}".format(book.title) )
         pid = 0
         if book.IsChild():
-            pid = book.parent[0].id
+            pid = book.parent.id
         try:
             ClearAuthorsForBook(book.id)
             db.session.delete(book)
@@ -828,30 +828,14 @@ def book(id):
                 CheckSeriesChange={'type':'parent', 'pid': book.id, 'bid': book.id, 'removing_series': removing_series }
             # saving a child / sub_book, consider series
             if book.IsChild() and len(removing_series) > 0:
-                CheckSeriesChange={'type':'child', 'pid': book.parent[0].id, 'bid': book.id, 'removing_series': removing_series }
+                CheckSeriesChange={'type':'child', 'pid': book.parent.id, 'bid': book.id, 'removing_series': removing_series }
             else:
                 # either we are a normal book (no parent/child), OR not removing a series, might be adding though, so easiest is to
                 # delete all bsls and then add them back based on the request.form
                 Book_Series_Link.query.filter(Book_Series_Link.book_id == book.id ).delete()
                 if book.IsChild():
-                    Book_Series_Link.query.filter(Book_Series_Link.book_id == book.parent[0].id ).delete()
+                    Book_Series_Link.query.filter(Book_Series_Link.book_id == book.parent.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)
             message=RemoveDuplicateSeriesInForm( book, request )
             db.session.commit()
 
@@ -985,10 +969,10 @@ def OrderBooks(books):
                 if tmp_b.IsChild():
                     # this child book wont be in books, but its parent will -> use it instead
                     # mark parent from books so we dont process it twice
-                    if tmp_b.parent[0].id not in processed:
+                    if tmp_b.parent.id not in processed:
                         processed.append(tmp_b.id)
-                        processed.append(tmp_b.parent[0].id)
-                        ordered_books.append(tmp_b.parent[0])
+                        processed.append(tmp_b.parent.id)
+                        ordered_books.append(tmp_b.parent)
                 else:
                     if tmp_b.id not in processed:
                         ordered_books.append(tmp_b)
diff --git a/templates/book.html b/templates/book.html
index 520aebc..3aca831 100644
--- a/templates/book.html
+++ b/templates/book.html
@@ -221,17 +221,17 @@ function AddAuthorToBook(num) {
 		<form role="form" class="form" action="" method="POST">
 			{{ book_form.id }}
         	{{ book_form.csrf_token }}
-			{% if b.parent|length %}
+			{% if b.parent %}
 				<div class="form-row">
 				<div class="input-group">
 					<label class="input-group-text col-2 col-form-label bg-secondary text-white"><i>Parent Book:</i></label>
 					<div class="col">
 						<span class="col-12 d-flex h-100 border rounded-end border-primary">
-							<i class="col-12 d-flex h-100 justify-content-center"><a href="/book/{{b.parent[0].id}}">{{b.parent[0].title}}</a></i>
+							<i class="col-12 d-flex h-100 justify-content-center"><a href="/book/{{b.parent.id}}">{{b.parent.title}}</a></i>
 						</span>
 					</div>
-					<input type="hidden" name="parent_id" value="{{b.parent[0].id}}">
-					<input type="hidden" name="parent_title" value="{{b.parent[0].title}}">
+					<input type="hidden" name="parent_id" value="{{b.parent.id}}">
+					<input type="hidden" name="parent_title" value="{{b.parent.title}}">
 				</div>
 				</div>
 			{% endif %}
@@ -303,7 +303,7 @@ function AddAuthorToBook(num) {
 							{% if key == "notes" %}
 								{% set rows=2 %}
 							{% endif %}
-							{% if b.parent|length and 
+							{% if b.parent and 
 								(key == 'publisher' or key == 'owned' or key == 'covertype' 
 								or key == 'condition' or key == 'blurb' )  %}
 								{{book_form[key](class="form-control", rows=rows, disabled="disabled" )}}
@@ -426,7 +426,7 @@ function AddAuthorToBook(num) {
 			{% else %}
 			<div class="form-row">
 			{% endif %}
-			{% if b.parent|length == 0 %}
+			{% if b.parent %}
 				<form role="form" class="form" action="{{url_for('new_book')}}" method="POST">
 					<input type="hidden" name="add_sub_parent_id" value="{{books.id}}">
 					{{ book_form.add_sub( class="btn btn-outline-success offset-2 col-2" )}}
@@ -434,7 +434,7 @@ function AddAuthorToBook(num) {
 			{% else %}
 				<form role="form" class="form" action="{{url_for('remove_sub_book')}}" method="POST">
 					<input type="hidden" name="rem_sub_sub_book_id" value="{{books.id}}">
-					<input type="hidden" name="rem_sub_parent_id" value="{{b.parent[0].id}}">
+					<input type="hidden" name="rem_sub_parent_id" value="{{b.parent.id}}">
 					{{ book_form.rem_sub( class="btn btn-outline-danger offset-2 col-3" )}}
 				</form>
 			{% endif %}
diff --git a/templates/books_for_series.html b/templates/books_for_series.html
index ce1ba42..3603d57 100644
--- a/templates/books_for_series.html
+++ b/templates/books_for_series.html
@@ -6,7 +6,7 @@
 		{% for book in books %}
 		<tr>
 			<td id="{{book.id}}">
-				{% if book.parent|length %}
+				{% if book.parent %}
 					{% set style="style=visibility:hidden" %}
 				{% endif %}
 				<button name="move_button" value="up-{{book.id}}" id="up-{{book.id}}" class="btn btn-outline-primary btn-small" {{style}}
@@ -51,8 +51,8 @@
 				{% endif %}
 				{% if SeriesBookNum( s.id, book.id ) == 1 %}
 					<script>
-						{% if book.parent|length %}
-							$('#up-{{book.parent[0].id}}').prop("disabled", true)
+						{% if book.parent %}
+							$('#up-{{book.parent.id}}').prop("disabled", true)
 						{% else %}
 							$('#up-{{book.id}}').prop("disabled", true)
 						{% endif %}
@@ -60,8 +60,8 @@
 				{% endif %}
 				{% if SeriesBookNum( s.id, book.id ) == s.num_books %} 
 					<script>
-						{% if book.parent|length %}
-							$('#down-{{book.parent[0].id}}').prop("disabled", true)
+						{% if book.parent %}
+							$('#down-{{book.parent.id}}').prop("disabled", true)
 						{% else %}
 							$('#down-{{book.id}}').prop("disabled", true)
 						{% endif %}