A farmer cultivates genetically modified potatoes so that a customer at Mc Donald's half a world away can enjoy a long, golden french fry. A gardener plants tulip bulbs in the autumn and in the spring has a riotous patch of colour to admire. Two simple examples of how humans act on nature to get what we want. Or are they? What if those potatoes and tulips have evolved to gratify certain human desires so that humans will help them multiply? What if, in other words, these plants are using us just as we use them? In blending history, memoir and superb science writing, Pollan tells the story of four domesticated species - the apple, the tulip, marijuana and the potato.