MMP has light shelfwear to edges. Pages tight and clean, but yellowed due to age. Spine has small creases. pages. MMP Binding. Year: 1972. ISBN: 0. Don Wilkerson is the brother of Dave Wilkerson who founded Teen Challenge and who told about the beginning of the work among troubled teenagers in New York City in ""The Cross and the Switchblade"". Don takes up the story where Dave left off. He concentrates on the work's amazing growth: the increasing number of dope addicts and other abandoned-for-lost individuals that have come to them for help; the search for and surprising discovery of larger and more suitable quarters; the addition of imaginative new projects like a farm for recovering addicts, a girl's home, a Bible training center; the young people who volunteered to work with and for Teen Challenge in many capacities.