Now you are the body of Christ and individually members of it" (1 Cor. 12:27). What does the doctrine of Christ's union with His saints have to do with the doctrines of grace? As it turns out, everything! Christians can only experience joy in their salvation when they understand that their salvation permanently unites them to Christ in a spiritual union. The five points of Calvinism are good news precisely because they make the Christian's union with Christ a reality. In Union with Christ, Jacob Tanner writes an accessible book for laypeople and pastors alike, establishing the connection between the sweet joys of Christian assurance in the doctrines of grace. Readers will go away from this book enjoying an even sweeter assurance of being united to Christ as members of His Body.