Cardinal Peter Gasparri, once a papal candidate, was perhaps the most influential theologian of his time. At the request of Pope St. Pius X, he authored the first major Code of Canon Law in Church history -- a staggering achievement in and of itself -- and then followed it with one of the greatest single-volume compendiums of Catholic doctrine ever written. This immensely popular catechism is back in print for the first time in almost a century...