Sky is the Limit: The Art of of Upgrading Your Life

Dale Carnegie with Douglas Fairbanks, Sun Tzu, Orison Swett Marden, Kahlil Gibran, Henry Thomas Hamblin, Ralph Waldo Emerson, James Allen, Wallace D. Wattles, Abner Bayley, P.T. Barnum, H.A. Lewis, Charles F. Haanel, B.F. Austin, Joseph Murphy, Benjamin Franklin, Samuel Smiles, William Walker Atkinson, Henry H. Brown, Russell H. Conwell, L.W. Rogers, Laozi, Marcus Aurelius, William Crosbie Hunter, Florence Scovel Shinn