Deals with the life and work of the great twentieth-century mathematician Shiing-Shen Chern. Included are numerous pages of photographs; an autobiographical article recounting the formation of a mathematical mind and of a great war; historical and personal reminiscences by thirty distinguished mathematicians and physicists including Bott, Griffiths, Lawson, Nirenberg, Singer, Yang, Yau, and others; and a discussion of 100 open problems in geometry. The book is essential for anyone who is interested in understanding Chern and his influence upon twentieth-century century mathematics.