Athabasca by Alistair MacLean

SABOTAGE!

THE VICTIMS
Two of the most important oilfields in the world - one in Canada, the other in Alaska.

THE SABOTEURS
An unknown quantity - deadly and efficient.

THE RESULT
Catastrophe.

One man, Jim Brady, is called in to save the life-blood of the world as, unerringly, the chosen targets fall at the hands of a hidden enemy ...