I'm not sure I ever met a geology book I didn't like before, but this one consisted of endless iterations of "[British gentleman] went to [British place] and discovered rock formations (often with fossils) which led him to name a geological era." I'd expected something much more like a collection of very short Simon Winchester pieces, but this was a lot more like what you'd think of as an old-school history of geology. It was quite effective for helping me fall asleep, but honestly I still don't know much about more about the geological eras that are the ostensible narrative skeleton here.