Bok av Various authors, James Allen, Ralph Waldo Emerson, Wallace D. Wattles, Douglas Fairbanks, Lao Tzu, Sun Tzu, Russell H. Conwell, Dale Carnegie, Florence Scovel Shinn, Charles F. Haanel, P.T. Barnum, Orison Swett Marden, Samuel Smiles, L.W. Rogers, Henry Thomas Hamblin, William Atkinson, Abner Bayley,
