Henry David Thoreau famously went to Walden Pond to “live deliberately, to front only the essential facts of life.” But as the scholar Laura Dassow Walls shows in a new biography, there was much more to Thoreau’s life and work than his brief experiment at Spartan living in the woods. He was an inventor, a manual laborer, a gifted naturalist, a writer of great originality, and an uncompromising abolitionist. Walls joins us Monday to explore Thoreau’s profound, complex, and influential life.