This is the description from Amazon
What if Protestantism were true?
That's the question Rose takes up and explores. Each argument assumes Protestantism is true and then attempts to make sense of Christian history and theology based on that assumption. In this way, he presents a series of intelligible and compelling arguments for the Catholic Church's claim to be the Church that Christ founded.
Catholics will learn to defend their faith, and Protestants will be challenged to answer the toughest questions about the roots of their beliefs.