The 27th Day by John Mantley
The 27th Day by John Mantley (Odhams Press / 1958)
Classic post-nuclear Sci-Fi tale of a secret concerning a weapon 'a thousand times more powerful than the H-bomb' imparted to five human beings by an alien intelligence. Will they be able to hold on to that secret in the face of power maniacs in every nation who seek to dominate the world.
Paperback in good condition but with some creasing to spine and other light wear to front and back cover commensurate with age.