The Goblin Market — Helen McCloy

It's 1943, and down-on-his-luck American expat Philip Stark is on the Caribbean island of Santa Teresa. The prewar destination playground is deserted now except for diplomats and oil refinery workers. When a local correspondent dies, Stark sees a chance to make some money. Having worked for the same company in the past, he is hired to replace the dead man. But Stark doesn't think his predecessor died by accident. As he looks into the mystery, he encounters a rival correspondent, an enigmatic police officer and the mistress of the dead man - all of whom had a stake in seeing him dead.