Dava Sobel is the author of five books, including the New York Times bestsellers Longitude, Galileo’s Daughter, and The Planets. She is a former New York Times science reporter and a longtime contributor to The New Yorker, Audubon, Discover, and Harvard Magazine. Her new book is The Glass Universe: How the Ladies of the Harvard Observatory Took the Measure of the Stars. Dava was in the Northwest to speak at Town Hall Seattle, presented by Town Hall and University Book Store, as part of the Science series.