From Wikipedia, the free encyclopedia. William Erwin "Will" Eisner (March 6, 1917 – January 3, 2005) was an American comics writer, artist and entrepreneur. He is considered one of the most important contributors to the development of the medium and is known for the cartooning studio he founded; for his highly influential series The Spirit; for his use of comics as an instructional medium; for his leading role in establishing... see more