<books>
  <book price='10p'>
    <title>Tom Sawyer</title>
    <author>Mark Twain</author>
  </book>
  <book>
    <title>Uncle Tom's Cabin</title>
    <author>Harriet Beecher Stowe</author>
  </book>
  <book price='5$'>
    <title>Pygmalion</title>
    <author>George Bernard Shaw</author>
  </book>
</books>
