Doubt of the Benefit - Ray Scott - Bog

A mysterious group prepares to carry out a ruthless terrorist attack...
Geoff Miller, a Melbourne loss adjuster, is investigating a Workers Compensation claimant, suspected of rorting the system. He follows him to a remote Victorian country property where he observes the claimant, and others, on an obstacle course. Whilst videoing the claimant from a distance, Miller realises he's stumbled across a private army or terrorist group, but whilst filming is caught in the act.
His disappearance causes his employers to contact authorities, which in turn leads to ASIO who are investigating an imminent suspected political assassination of a visiting foreign dignitary. Miller's disappearance appears to connect with their own investigation. There is a thrilling race against time to find Miller and prevent the assassination attempt.