All his life Yuri Maximovich Isakovsky, a minor Russian poet, editor of a journal of folk music, sometime English translator, has assiduously avoided power and politics--in fact, attention of any kind. How can it be, then, that the Soviet government has chosen him to attend a conference in the fabled land of bourgeois temptation itself, New York City? And not only that, but to do a "piece of work" for the KGB, to deliver a code message embedded in...