Caerlaverock is a top secret American missile silo situated in the Welsh hills, which contains the missile known as Spectre III, the most advanced on the planet. The security is strong, so to get into the base, the Russians use Mark Sallus, who has a knowledge of voodoo, and who knows a man inside. But when the Petro Gods of voodoo meet thermonuclear technology, the result can only be apocalyptic.
Used availability for Guy N Smith's Warhead
February 1981 : UK Paperback
April 2011 : USA, Canada, UK Kindle edition