Assignment Amazon Queen

A terror-filled trip into the vicious wilderness of the Amazon jungle. Hidden in the depths of the Brazilian jungle was a secret formula so deadly that its possessor would gain the power of life and death over the entire human race. For Sam Durell it was one of the toughest assignments of his life. Competing against the best agents of the great world powers he had to penetrate the terrible jungle. Struggling against enormous odds he simply had to get there first─or the death formula would carry its fearful message to millions . . . From Back Cover Blurb