You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="BC_Bill|209" />
  </query-continue>
  <query>
    <pages>
      <page pageid="10" ns="0" title="Books" />
      <page pageid="139" ns="0" title="Ampalsoft" />
      <page pageid="148" ns="0" title="B &amp; H Software" />
      <page pageid="1037" ns="0" title="Boulder Crash" />
      <page pageid="4282" ns="0" title="Caverns Of Chaos" />
      <page pageid="4616" ns="0" title="Sword And The Sorcerer" />
      <page pageid="5279" ns="0" title="BASIC Tutorial" />
      <page pageid="5280" ns="0" title="Advanced Tutorial" />
    </pages>
  </query>
</api>