Rick Hutchinson was the keeper of Yellowstone National Park’s geysers, an amiable and eccentric geologist who knew the park backcountry better than anyone until an avalanche buried him and a park volunteer in 1998. Rangers found their bodies in snow honeycombed with caverns sculpted by heat from hot springs that may have loosed the avalanche. In RIDDLE OF THE GEYSERS award-winning science writer Michael Milstein, a friend of the geologist, probes the geological and human mysteries behind the killer avalanche. Like The Perfect Storm, the book will introduce readers to the science of a disaster, to scientists who tiptoe between scalding cauldrons and lower cameras into geysers. It will introduce the scientists who scramble down cliffs and dive into icy lakes to make sense of the wild geology of the world’s first national park and giant volcano dozing beneath it.