The certain evil of the title here is one of the surefirest chestnuts of reporter stories: should the correspondent hold his tongue when it is perhaps in the national interest but certainly against his own conscience? Joe Warrick, Washington correspondent for the Miami Sentinel, is handed a scoop by the State Department in a secret meeting. The President has sent a private, blistering cable to Umberto Aranja, the elected head of a Caribbean republic. The President has decided to help a guerrilla leader overthrow the island nation, although ostensibly the U.S. condones that country's policy. Joe Warrick suspects that the CIA is arming an invasion similar to that against Cuba. If he prints his so- called scoop, he will become a State Department errand boy. He does print it and becomes involved in a national uproar, and down in the Caribbean the secrets he uncovers could blow up the whole U.S. plan... Scenes in the public and private lives of two governments alternate with the Washington press corps background. The story is interesting, the writing grey, characterization uninspired.