The printing press was invented in 1440, allowing written works — like the Bible — to be widely produced and distributed.
Desiderius Erasmus’ Greek New Testament of the Bible, the first of its kind to be made, was published in 1516, facilitating the movement “ad fontes,” and a close examination of scripture in its original language.
The Protestant Reformation kicked off contemporaneously, circa 1517.
Coincidence? I think not.
When the Word of God is unleashed, expect theological reform.
At the heart of the Reformers’ agenda was to put the scriptures into the hands and ears of the people. Contrast that with the Roman Catholic Church, who, at the time, forbid preaching or translating the Bible into the common language. (Of what were they afraid?)
This book is written to those who are Protestant, in an effort to help them sense the theological chasm between Protestantism and Rome. As such, it is not written as much with an eye towards Catholics, to help them understand Protestant convictions or arguments.
Almost all attention is given to unpacking Catholic thought. Protestant views are only mentioned occasionally in so much as to provide a contrast. But they are not expanded upon.
The above is not a critique of the book, just a clarification that if you are looking for a book that contrasts Protestant and Catholic belief, simultaneously making a case for Protestantism, for example, this is not your book. Sproul, rather, is detailing Catholic thought with an aim of depressing inappropriate ecumenical tendencies (i.e., blowing off differences with Rome) among protestants.
As he proceeds towards this aim, Sproul does a fair job presenting Catholic views. He is charitable, and avoids caricatures, which are all too common among protestants. He gives the needed nuance to Catholic views. He wants to help protestants genuinely understand Catholic theology, and to see it’s rationale.
This book is to be recommended for those looking to understand Catholicism better, specifically on those key subjects where it differs most significantly from Protestant thought.