"In honor of the bicentennial of Henry David Thoreau's birth, this edition of Walden features an introduction and annotations by renowned environmentalist Bill McKibben. 'We need to understand that when Thoreau sat in the dooryard of his cabin 'from sunrise till noon, rapt in a revery, in undisturbed solitude and stillness, while the birds sang around or flitted noiseless through the house,' he was offering counsel and example exactly suited for our...