Shell Game by Douglas Terman

A superb, high-voltage thriller set against the political turmoil of Cuba in the early 60's and the countdown to the missile crisis, Shell Game invites comparison with the best of Ken Follett and Frederick Forsyth.

Brocassie and his adoptive brother Julio Alvarez had fought together against Batista's corrupt regime. Both men loved their fellow revolutionary, Alicia Helvia. When Castro triumphed, Alvarez became one of his closest aides -- an enthusiastic supporter of the ruthless measures demanded by the new Cubba. But Brocassie and Alicia fought on for the revolution against the Communist regime, though both were separated in the bloody chaos of the guerrilla fighting.

Now Brocassie is back in Cuba. This time he is there for the US government who are anxious to discover just what is being built in a deserted stretch of countryside.
Hunted by the man who is closer to him than any other - his brother - Brocassie is unaware of the spur that drives Alvarez. For Alicia, despairing of Brocassie's life, has become his mistress. Once they were brothers in arms. Now they are divided by far more than politics. Winner or loser, each man will be asked to pay a dreadful price for victory.

The most explosive thriller in years, Shell Game is a novel of rare excitement and suspense which marks the emergence of Douglas Terman as one of the masters of the genre.