Golden Serpent

Blurb from the book:

lan McQueen, aka Mac, was once a star of the global intelligence community, renowned for being the Aussie spook who shot and killed Abu Sabaya, the world's most dangerous terrorist. But that was 2002. Now, during a routine assignment in Indonesia, McQueen discovers that Sabaya is not in fact dead. Instead he's teamed up with rogue CIA veteran Peter Garrison and is armed with a cache of stolen VX nerve agent he's threatening to deploy in a dramatic and deadly manner. Battling to stay one step ahead of Sabaya's hit-men, CIA double-agents and deep corruption within Australian intelligence, Mac must find the stolen VX before it's too late. His mission will take him on a chase through South-East Asia and test all of his considerable courage and ingenuity.