Leonard Shlain (August 28, 1937 – May 11, 2009) was an American surgeon, writer, and inventor. He was chairperson of laparoscopic surgery at the California Pacific Medical Center in San Francisco, and was an associate professor of surgery at University of California, San Francisco. His books include Art & Physics: Parallel Visions in Space, Time, and Light (1991), The Alphabet Versus the Goddess (1998), Sex, Time and Power: How Women's Sexuality Shaped Human Evolution (2003), and Leonardo's Brain: Understanding da Vinci's Creative Genius (2014). Source: Wikipedia (en)