The book "Confession" by Tolstoy describes the crisis of depression and alienation from the world. It is an autobiographical work with exceptional emotional honesty. It refers to his search for "a practical religion that does not promise future bliss, but offers happiness on earth." Although "Confession" led to Tolstoy's excommunication, it also sparked the creation of a large group of Tolstoyan Christians across Russia and Europe. Historically, certain books have changed the world, transforming the way we see ourselves and others. They have inspired discussions, disagreements, wars, and revolutions. They have enlightened, enraged, challenged, and comforted. They have enriched lives and destroyed them. Now Penguin brings us the works of great thinkers, pioneers, radicals, and visionaries whose ideas have shaken civilization and helped us become what we are.