The Ear, the Eye and the Arm — Nancy Farmer

Zimbabwe, 2194

The three children of the wealthy and powerful General Matsika steal out of the house on a forbidden adventure -- and promptly disappear. Their parents call in the best detectives in Africa, or at least the most unusual: the Ear, the Eye and the Arm, whose exposure to nuclear waste has given them powers far beyond those of other human beings. Their mission takes them to the underbelly of the city, where truth and lies are often the same; to the toxic and dangerous Dead Man's Vlei, ruled by the tyrannical She-Elephant; to the swaying top of the luxurious Mile-High MacIlwaine Hotel. Yet the children stay just out of their reach. The evils of the past, the technology of the future, criminals with plans far beyond what anyone can imagine -- can the Ear, the Eye and the Arm snatch the Matsika children from the heart of it all?