In Basin and Range, McPhee traveled across the United States with a strong proponent of plate tectonics. In this volume, he travels over some of the same terrain with Anita G. Harris, a geologist who questions the ability of plate tectonics to completely explain the geology of this part of the world. As always, McPhee conveys the brilliant enthusiasms of those he profiles and the engaging complexity of the disciplines within which they work.
This is the second of four books on North American geology by McPhee, collectively entitled Annals of the Former World. The other volumes are Basin and Range, Rising from the Plains, and Assembling California.