Mark “Marko” Oestreicher is a veteran youth worker and founding partner in The Youth Cartel, providing resources, training, and coaching for church youth workers. The author of dozens of books, including Youth Ministry 3.0 and Hopecasting: Finding, Keeping and Sharing the Things Unseen, he’s a sought-after speaker, writer, and consultant. Marko blogs at www.whyismarko.com. Marko lives in San Diego with his wife, Jeannie, and their children, Riley and Max.