I have been intrigued with the idea of atonement for some time now. Atonement is one of those beliefs that has generated a tremendous amount of conversation and even some disagreement. A number of theories of atonement abound in Biblical and theological studies. One of those theories deals with the idea of penal substitution. The idea of penal substitution is based on Romans 6:23 which declares that the wages of sin is death. Our sin earns the punishment of death, but instead of us reaping the wages of sin, Jesus comes as our substitute (this is a very simplistic definition of penal substitution). One book that focuses on the penal substitution theory of atonement is "It Is Well: Expositions on Substitutionary Atonement" by Mark Dever and Michael Lawrence. This book is very insightful about this theory of atonement, but I believe that certain statements in the book minimize the other theories of atonement. While I believe wholeheartedly that atonement does include penal substitution I also believe that atonement is a complex idea that includes more than only penal substitution. I value the insight the Dever and Lawrence draw from Scripture on this theory and I think this book lays a strong foundation for the Biblical understanding of penal substitution. But to accept penal substitution at the expense of the remaining theories of atonement is difficult for me. Overall this is a very solid book on the atonement theory of penal substitution, but it is not the end of the conversation on atonement. It is simply another solid addition to the conversation. I don't believe that atonement can be fully grasped because it flows from the love that God has for us. I recommend this book be read along side books on the other theories of atonement to get a balanced perspective.I received this book free from Crossway to review.