I do love John McPhee, but I was never able to get into this. I tried four different times, over 16 months. I did finish. The topics are good. The Mississippi River would naturally have changed channels on 1973. A town in Iceland tries to save itself from a series of lava flows. And in LA one of the best places to live are the San Gabriel Mountains, where landslides and debris flows are coming everywhere, sooner or later.