diff --git a/app/models/book.rb b/app/models/book.rb
index 87ff523..b871f30 100644
--- a/app/models/book.rb
+++ b/app/models/book.rb
@@ -171,8 +171,8 @@ class Book
       files = []
       self.book_files.each do |book_file|
         url = book_file.member_book_file.url
-        title = (book_file.title.blank? ? File.basename(book_file.member_book_file.path) : book_file.title)
-        files << "<li><a href='#{url}'' target='_blank'>#{title}</li>"
+        title = ((book_file.title.blank? ? File.basename(book_file.member_book_file.path) : book_file.title) rescue "")
+        files << (url.nil? ? "" : "<li><a href='#{url}'' target='_blank'>#{title}</li>")
       end
       value = files.join("")
     else