Jim Hancock invested two decades as a church-based youth worker. Now he spends his days in Leucadia, California, writing and creating digital movies and learning designs for youth workers, parents, and adolescents. He's the author of Raising Adults, The Justice Mission, as well as many other resources and coauthor of The Worker's Guide to Helping Teens in Crisis. Jim Hancock ha trabajado por dos decadas con la juventud. Ha escrito numerosos libros para padres, adolescentes, lideres juveniles y jovenes solteros. Es el productor general de una serie de videos educativos muy populares en Estados Unidos llamados Edge TV. Dr. Kara Powell serves as an assistant professor in Youth and Family Ministry and the Executive Director of the Fuller Youth Institute (FYI) at Fuller Theological Seminary. She speaks regularly at youth ministry conferences and is the author or co-author of a number of books including Deep Justice in a Broken World, Deep Ministry in a Shallow World, and the Good Sex Youth Ministry curriculum. Kara lives in Pasadena, CA, with her husband, Dave, a medical device engineer, and their children Nathan, Krista, and Jessica. Kara Eckmann Powell es directora ejecutiva del Centro para la familia y el ministerio juvenil del Seminario Teologico Fuller. Ha sido pastora de jovenes por 15 anos y es una oradora popular en temas de pastoral juvenil en Estados Unidos.