In the lively, elegant, and finely crafted Political Exercise, Lawrence D. Brown begins with a simple and completely uncontroversial idea: active living is a key to health and happiness. And yet it’s devilishly hard to configure cities in a way that promotes this idea. In the little steps toward active living taken in five cities, Brown finds lessons, cautions, and tempered success. An enjoyable and very readable book with lessons and advice for urbanists, policy analysts, health care specialists, and reformers.