Medical analogies applied to cities and planning are nothing new. The problems of cities have often been described as "ailments," and in the middle of last century the "diagnosis" resulted in removing the "tumor" of blight and replacing it with "healthy" buildings and landscapes through urban renewal. Even though this technique, post-Jane Jacobs, is not the preferred route, the way of looking at the city as a body to be cured prevails. Look no further than this book by the former mayor of Curitiba, Brazil, who proposes small-scale "pinpricks" of action that should have a ripple effect on the larger city. Like anything in cities, the effect of any physical change – big or small – depends on so many more things than just the building, landscape, installation, or whatever the piece may be. Nevertheless, I like the thought of something mildly painful yet more gentle than surgery – acupuncture – being used as the analogy, just as I like the idea that small things have big impacts. Lerner's book similarly is full of short chapters that describe various ways of intervening or just plain thinking about the city. It's a diverse crop of ideas that ultimately is focused on the coming together of people in public space.