PUSHING TIME AWAY is Peter Singers biography of his grandfather, an obscure classical scholar named David Oppenheim. As a young man in Vienna, Oppenheim, a teacher, was a friend and collaborator of Freud. When he returned from service in World War I, he was a different man--shellshocked, burned out, and disillusioned. He turned inward, took refuge in his teaching, and never again published a book. In 1939, he and his family were sent to Theresienstadt, and he died there in 1943--forgotten until his grandson decided to write his story.