The book is the best little explanation of what makes Protestants tick. It is clear, objective and sympathetic to Protestants without granting them much ground. The contrasts with Catholicism are pointed out in simple and straightforward language. It is a great little primer for understanding the underlying history and world view of non-Catholic Christians.
Cyprian Blamires used to be an Evangelical Anglican priest. He was educated (as I was) at Wycliffe Hall, Oxford. He was received into the Catholic Church in 1979, and has been a faithful servant of the Church through his service with the St Barnabas Society.