This is an easy read. It is written, I think, for the laity. He states clearly how Calvin saw his world and how it relates to ours. You may not agree with everything he writes but you will come away rethinking Calvin's work. If you are a pastor it should make you want to read the some of the literature recommended. The author tries to get me to see Calvin in our timeframe.
I wanted the book to explain its title of Calvin being a reformer for the 21st Century. He explained Calvin, but didn't find anything new or fresh in its presentation or its content. Calvin was not reintroduced as a 21st Century figure, but a reformer of the 16th Century. I recommend the book for someone just introduced to Calvin's life and basic beliefs.