diff --git a/cps/editbooks.py b/cps/editbooks.py
index 99d4f69a..263a69fb 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -1096,6 +1096,7 @@ def table_get_custom_enum(c_id):
     cc = (calibre_db.session.query(db.Custom_Columns)
               .filter(db.Custom_Columns.id == c_id)
               .filter(db.Custom_Columns.datatype.notin_(db.cc_exceptions)).one_or_none())
+    ret.append({'value': "", 'text': ""})
     for idx, en in enumerate(cc.get_display_dict()['enum_values']):
         ret.append({'value': en, 'text': en})
     return json.dumps(ret)
diff --git a/cps/static/js/table.js b/cps/static/js/table.js
index d1a32862..0600f0b3 100644
--- a/cps/static/js/table.js
+++ b/cps/static/js/table.js
@@ -645,6 +645,9 @@ function singlecheckboxFormatter(value, row){
 }
 
 function ratingFormatter(value, row) {
+    if (value == 0) {
+        return "";
+    }
     return (value/2);
 }
 
diff --git a/cps/templates/book_table.html b/cps/templates/book_table.html
index 6f8e8747..fb0cfed8 100644
--- a/cps/templates/book_table.html
+++ b/cps/templates/book_table.html
@@ -76,7 +76,7 @@
               {% if c.datatype == "int" %}
                 <th data-field="custom_column_{{ c.id|string }}" id="custom_column_{{ c.id|string }}" data-visible="{{visiblility.get('custom_column_'+ c.id|string)}}" data-sortable="false" {% if g.user.role_edit() %} data-editable-type="number" data-editable-placeholder="1" data-editable-step="1" data-editable-url="{{ url_for('editbook.edit_list_book', param='custom_column_'+ c.id|string)}}" data-edit="true" data-editable-title="{{_('Enter ') + c.name}}"{% endif %}>{{c.name}}</th>
               {% elif c.datatype == "rating" %}
-                <th data-field="custom_column_{{ c.id|string }}" id="custom_column_{{ c.id|string }}" data-formatter="ratingFormatter" data-visible="{{visiblility.get('custom_column_'+ c.id|string)}}" data-sortable="false" {% if g.user.role_edit() %} data-editable-type="number" data-editable-placeholder="1" data-editable-step="1" data-editable-min="0" data-editable-max="5" data-editable-url="{{ url_for('editbook.edit_list_book', param='custom_column_'+ c.id|string)}}" data-edit="true" data-editable-title="{{_('Enter ') + c.name}}"{% endif %}>{{c.name}}</th>
+                <th data-field="custom_column_{{ c.id|string }}" id="custom_column_{{ c.id|string }}" data-formatter="ratingFormatter" data-visible="{{visiblility.get('custom_column_'+ c.id|string)}}" data-sortable="false" {% if g.user.role_edit() %} data-editable-type="number" data-editable-placeholder="1" data-editable-step="0.5" data-editable-step="1" data-editable-min="1" data-editable-max="5" data-editable-url="{{ url_for('editbook.edit_list_book', param='custom_column_'+ c.id|string)}}" data-edit="true" data-editable-title="{{_('Enter ') + c.name}}"{% endif %}>{{c.name}}</th>
               {% elif c.datatype == "float" %}
                 <th data-field="custom_column_{{ c.id|string }}" id="custom_column_{{ c.id|string }}" data-visible="{{visiblility.get('custom_column_'+ c.id|string)}}" data-sortable="false" {% if g.user.role_edit() %} data-editable-type="number" data-editable-placeholder="1" data-editable-step="0.01" data-editable-url="{{ url_for('editbook.edit_list_book', param='custom_column_'+ c.id|string)}}" data-edit="true" data-editable-title="{{_('Enter ') + c.name}}"{% endif %}>{{c.name}}</th>
               {% elif c.datatype == "enumeration" %}