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<title>TCP/IP Illustrated</title> is -9.5 more expensive than the average. </data>
<data>
<title>Advanced Programming in the Unix Environment</title> is -9.5 more expensive than the average. </data>
<data>
<title>Data on the Web</title> is -35.5 more expensive than the average. </data>
<data>
<title>The Economics of Technology and Content for Digital TV</title> is 54.499999999999986 more expensive than the average. </data>
</results>