David Wilkerson had his life all planned out: a quiet pastorate in a small country church. But God had others plans, calling him to share the good news of Christ with violent gang members in New York City. Forty-five years later that young pastor still oversees Teen Challenge, the ministry that grew out of that calling. His story is a testimony to what can happen when ordinary people open themselves up to the work of an extraordinary God. Foreword by Chuck Colson.