Exploring the links between creativity and madness, Dr. Hans Prinzhorn formed an astonishing art collection—with works ranging from expressive paintings to life-size rag dolls and sculptures made from chewed bread—inspiring such modernists as André Breton and Salvador Dalí. By the mid-1930s, however, Prinzhorn's collection attracted the attention of a far more sinister group, Adolf Hitler's Nazi party. Telling Prinzhorn's story, the author of The Book Smugglers of Timbuktu recounts how Hitler's war on modern art and the mentally ill paved the way for the Holocaust.