Betty Miller opens her 1946 “Notes for an Unwritten Autobiography” provocatively, branding herself a “Fifth Columnist” who had at one time worked to undermine her country from within. Rather than any clandestine operation that she participated in as an adult, however, Miller’s stint as a “Fifth Columnist” occurred when she was just a child. While a young girl in a nursery in Ireland, Miller increasingly became captivated by the image of the German Kaiser Wilhelm II. Although Miller understood...