diff --git a/app/models/book.rb b/app/models/book.rb
index a038946..47f0045 100644
--- a/app/models/book.rb
+++ b/app/models/book.rb
@@ -100,7 +100,7 @@ class Book
       
       pd_data = []
       fields_to_show.collect do |t|
-        if page.custom_string_field == "table"
+        if !page.nil? && page.custom_string_field == "table"
           case t
           when "book_title"
             pd_data << { "data_title" => "<a href='#{OrbitHelper.url_to_plugin_show(p.to_param,'personal_book')}' target='_blank'>#{p.book_title}</a>" }