XML : Merging text and XML data in combobox items in WPF

I have a ComboBox in WPF that gets data from XML as shown below.

  <?xml version="1.0"?>  <Root>    <Book>      <Name>Title1</Name>      <Name>Title2</Name>      <Name>Title3</Name>    </Book>  </Root>    <ComboBox x:Name="cb_Book" ItemsSource="{Binding Source={StaticResource XmlData}, XPath=./Book/Name}"/>    

I would like to merge a static default text along with items retrieved from XML. I had tried few approaches like CompositeCollection shown here but was unsuccessful. Is there a best way to do this (preferably all in XAML)?

At the end ComboBoxItems should look like this:

  Title1      #from XML  Title2      #from XML  Title3      #from XML  MoreTitle   #Static Default text