When the first edition of Roadside Geology of Oregon was published in 1978, it was revolutionary the first book in a series designed to educate, inspire, and wow nongeologists. Back then, the implications of plate tectonic theory were only beginning to shape geologic research and discussion. Geologists hadn't yet learned that Oregon's Klamath and Blue Mountains were pieces of far-traveled island arcs and ocean basins that had been piled against the growing North American continent. Steaming volcanoes, ghost forests, recent landslides, and towns heated with geothermal energy attest to Oregon's still-prominent position at the edge of an active tectonic plate.