monte kiffin bag-o. was one of the great. blood of german pows well contemporary art he was incredibly prolific producing thousands of works of all sorts of artistic endeavor including even 150 books in his short life time he lived on the edge and died in 1970 of liver cancer just 44 years old right now a museum in the western german city of bone is holding a huge retrospective of his work which reflects his extraordinary production in all its facets and contents. of cynical.