This Changes Everything: How the Gospel Transforms the Teen Years by Jaquelle Crowe. This book, written by a nineteen-year-old, speaks directly to teenagers. Crowe shares exactly what the gospel is, and how it radically and joyfully transforms the lives of teens.
Gospel: Recovering the Power that Made Christianity Revolutionary by J.D.Greear. A seminal work on the bottomless riches of the Gospel, with emphasis on what this means for practical, everyday living.