Murder in Havana (Capital Crimes 18)

Max Pauling, of Murder in Foggy Bottom, is coaxed out of a restless retirement by another "ex-" CIA colleague. The case that tempts him is one involving a large American pharmaceutical firm that may be using a German company as a front to get around the U.S. scientific and technical embargo of Cuba.
What's at stake? An ex-senator, who heads up a drug company, is after big game: the surprising and stunning medical research being conducted by the Cubans to develop a more effective anticancer drug. Max, who is among other things a pilot, is assured that this will be a purely private assignment—no assassinations, no government to subvert, no informers to turnjust a few easy flights and a little time in the sun. Once in Havana, he makes contact with a ravishing Cuban-American woman who is to be his "translator." Soon, he finds himself hunted as an assassin in a place where murder is sanctioned for a greater good, or greater greed, and those caught in the crossfire are as quickly consumed as a frozen daiquiri.