Book critic John Leonard reviews "Daddy, We Hardly Knew You." It's writer Germaine Greer's memoir of her father. He spent the first 5 years of her life away in the Australian Air force during World War 2. Upon his return, and until his death in 1983, he was quiet, distant, and would never talk about the war. This book is both Greer's memories of her father's life, and her investigation into what he did during those missing five years.