John Devereaux, an SAS Warrant Officer, is seconded to the Australian Secret Intelligence Service and handed a mission that will test him to his very core - both professionally and personally.

The operationally deniable mission: infiltrate into Cambodia via parachute in the dead of night, alone, and assassinate two high-value targets guarded by two-dozen elite soldiers.

From the relentless jungles of Cambodia to the chaotic civilian-filled streets of Sydney and Bangkok, to the secretive dens of Moscow and the extravagant French Riviera, explosive SAS and ASIS action uncovers a shadowy and powerful organisation that brings us face to face with the Russian Mafia.

Unbeknown to Devereaux, the Director-General of the Secret Intelligence Service, is testing him for a far more important role - to head an off-the-books clandestine cell buried deep inside this secret organisation and known only as MANTRA-6.

Devereaux's mission has only just begun ...

Mantra 6: Brimstone is the first in Russel Hutchings' explosive new thriller series featuring operative John Devereaux.