Duval investigates the death of an illegal immigrant killed after he disembarked from a freighter at New York.

Duval investigates the disappearance of a valuable antibiotic somewhere between New York and the World Health Organization in Sweden.

The value of paintings by Hugo Ballard begins to soar after his death, so why would his widow slash one of his paintings?

Duval flies to Delhi to locate a consignment of live cholera vaccine stolen from a laboratory in Karachi.