“Glassley’s A Wilder Time is a wonderful mix of science and poetry. It delves into the kind of spiritual effect that wilderness has on those privileged to work in it and how it changes the way we experience and understand our surroundings and our lives. The science, including the geological controversy at the heart of the book, is lucidly explained, and readers will be absorbed by the story Glassley tells as well as his many vividly described encounters with nature. Next time someone asks me why I am a geologist, I will just hand them this book.”