Book excerpt: Father Walter Ciszek, S.J., author of the best-selling He Leadeth Me, tells here the gripping, astounding story of his twenty-three years in Russian prison camps in Siberia, how he was falsely imprisoned as an "American spy", the incredible rigors of daily life as a prisoner, and his extraordinary faith in God and commitment to his priestly vows and vocation. He said Mass under cover, in constant danger of death. He heard confession of hundreds who could have betrayed him; he aided spiritually many who could have gained by exposing him. This is a remarkable story of personal experience. It would be difficult to write fiction that could honestly portray the heroic patience, endurance, fortitude and complete trust in God lived by Fr. Walter Ciszek, S.J.