1. Victor Frankl, Man’s Search for Meaning,2006, Beacon Press (first published 1946)
    2. M. Scott Peck, The Road less Travelled, 1978, Simon & Schuster
    3. Eugene O’Kelly, Chasing Daylight, 2007, McGraw-Hill Education
    4. Marshall B. Rosenberg, Nonviolent Communication: A Language of Life, 2003, Puddledancer Press
    5. Leo Buscaglia, Living, Loving, Learning, 1985, Ballantine Books