Ogoun's Bomb
by Pentland Hick
Ogoun lives in Maronterre, a fictional country between Haiti and the Dominican Republic in Hispaniola: Voodoo country, where the Ogoun family are notorious on the black side.
Ogoun is planning a coup at the time of the Cuban missile crisis, and when Khrushchev is forced to pull his nuclear missiles out of Cuba the ships carrying them have to pass the next Island, Hispaniola.