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  <book year="1994">
    
     <title>TCP/IP Illustrated</title>
    
     <author>
        <last>Stevens</last>
        <first>W.</first>
     </author>
    
     <publisher>Addison-Wesley</publisher>
    
     <price> 65.95</price>
   </book>
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  <book year="1992">
    
     <title>Advanced Programming in the Unix environment</title>
    
     <author>
        <last>Stevens</last>
        <first>W.</first>
     </author>
    
     <publisher>Addison-Wesley</publisher>
    
     <price>65.95</price>
   </book>
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  <book year="2000">
    
     <title>Data on the Web</title>
    
     <author>
        <last>Abiteboul</last>
        <first>Serge</first>
     </author>
    
     <author>
        <last>Buneman</last>
        <first>Peter</first>
     </author>
    
     <author>
        <last>Suciu</last>
        <first>Dan</first>
     </author>
    
     <publisher>Morgan Kaufmann Publishers</publisher>
    
     <price>39.95</price>
   </book>
  <?xml version="1.0" encoding="UTF-8"?>
  <book year="1999">
    
     <title>The Economics of Technology and Content for Digital TV</title>
    
     <editor>
     
        <last>Gerbarg</last>
        <first>Darcy</first>
     
        <affiliation>CITI</affiliation>
    
     </editor>
    
     <publisher>Kluwer Academic Publishers</publisher>
    
     <price>129.95</price>
   </book>
  <?xml version="1.0" encoding="UTF-8"?>
  <book year="2004">
    
     <title>Beginning XML, 3rd Edition</title>
    
     <author>
        <last>Hunter</last>
        <first>David</first>
     </author>
    
     <author>
        <last>Watt</last>
        <first>Andrew</first>
     </author>
    
     <author>
        <last>Rafter</last>
        <first>Jeff</first>
     </author>
    
     <author>
        <last>Cagle</last>
        <first/>Kurt</author>
    
     <author>
        <last>Duckett</last>
        <first>John</first>
     </author>
    
     <publisher>Wrox Press</publisher>
    
     <price>TBA</price>
   </book>