Book excerpt: What is there to see in Glacier National Park after the sun goes down? As writer and photographer John Ashley reveals in his newest book, some of Glacier’s most awe-inspiring sights are found high above the mountaintops. Readers will marvel at Ashley’s spectacular color photographs of favorite Glacier landmarks such as Chief Mountain and St. Mary Lake lit by the Milky Way, northern lights, and a universe of wonders. These images complement Ashley’s text, which includes clear explanations of astronomical phenomena, traditional Blackfoot stories, Glacier National Park geology and history, and entertaining tales of his own run-ins with curious critters and park rangers. Ashley rallies readers to combat light pollution, a problem that has begun to erode the ancient beauty of one of the last truly dark places in the country.