Australia's High Court reinstated a terrorism conviction Friday against a former Australian airline worker who published on the Internet a do-it-yourself book on how to wage holy war against non-Moslems.The five judges unanimously overturned a lower court's 2-1 majority decision that had quashed Sydney resident Belal Sadallah Khazaal's conviction for producing a book knowing it was connected with assisting in a terrorist act. There was no evidence that it had resulted in a terrorist attack.