British diplomat Justin Quayle, complacent raiser of freesias and doting husband of the stunning, much younger Tessa, has tended his own garden in Nairobi too long. Tessa is Justin's opposite, a fiery reformer, "that rarest thing, a lawyer who believes in justice," whose campaigns have earned her a nickname: "the Princess Diana of the African poor." But now Tessa has turned up naked, raped, and dead on a mysterious visit to remote Lake Turkana in Kenya. Her traveling companion (and lover?), the handsome Congolese-Belgian doctor Arnold Bluhm, has vanished. So has Quayle's complacency. Tessa had been compiling data against a multinational drug company that uses helpless Africans as guinea pigs to test a tuberculosis remedy with unfortunately fatal side effects. Her report was destroyed by her husband's superiors; was she? It's all somehow connected to the sinister British firm House of ThreeBees, whose ad boasts that it's "buzzy for the health of Africa!" John le Carr