His life is well documented in the beautifully written biography by his wife Valerie , `` The Disciple and His Devil , '' published by McGraw-Hill in 1970 and republished by iUniverse in 1984 . His life is well documented in the beautifully written biography by his wife Valerie , `` The Disciple and His Devil , '' published by McGraw-Hill in 1970 and republished by iUniverse in 2004 .