Try using the In App Browser plugin.
If you are using a later version of Phonegap / Cordova (2.8.0, 2.9.0, etc.), it should appear with it - nothing else needs to be installed.
http://docs.phonegap.com/en/2.9.0/cordova_inappbrowser_inappbrowser.md.html#InAppBrowser
This will allow you to open the PDF file in a new window that overlays your application. It has a Finish button that users can use to close it and return to their application when they are complete.
You will open the PDF file using the In-App browser using something like this:
window.open('http://whitelisted-url.com/pdftoopen.pdf', '_blank');
those. the _blank option launches the In-App Browser plugin. If you used _system , he could open it in iBooks instead (just guess there - not 100% sure if he will use iBooks).
asgeo1
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