John Paul II made no secret of his interest in the political upheavals and religious controversies in his native Poland. But a book of his private correspondence about to be published in Poland demonstrates an astonishing attention to detail—and an acute sensitivity to anything he saw as a departure from church teachings. In "John Paul II: Greetings and Blessings," Marek Skwarnicki, a well-known Roman Catholic writer in Cracow, makes public the letters he got from John Paul II throughout his entire papacy, right up until two weeks before the pope’s death.