XML : How to I compare values using XPath expressions in Java

Example XML element called book:

  <book>  <Title> Mocking Bird </Title>  <Year> 1960 </Year>  <Genres>  <Genre> Novel </Genre>  </Genres>  </book>    

I am trying to show all the books and the year they were published where the genre is 'novel'. Here is my code:

  result = stmt.executeQuery("  SELECT a.book.extract('/Book/Title | /Book/Year').getStringval()  FROM BooksDB a  WHERE a.book.extract('Book/Genres/Genre').getStringVal() = ' Novel '");    

Then I display the results to the console:

  while(result.next()) System.out.println(result.getString(1));    

The program runs successfully and the XPath expression is "valid" but not logically correct as it does not return any values. Any advice is appreciated!