The constant gardener

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 Carré symbolically associates ThreeBees with an ominous buzz in the Nairobi morgue: "Over [the corpses], in a swaying, muddy mist, hung the flies, snoring on a single note."