Greg Gilbert does so in What Is the Gospel? Beginning with Paul's systematic presentation of the gospel in Romans and moving through the sermons in Acts, Gilbert argues that the central structure of the gospel consists of four main subjects: God, man, Christ, and a response. The book carefully examines each and then explores the effects the gospel can have in individuals, churches, and the world. Both Christian and non-Christian readers will gain a clearer understanding of the gospel in this valuable resource.