The late Mike Yaconelli was the founder of Youth Specialties (http://www.YouthSpecialties.com). He spent 43 years of his life in ministry. For 25 years, starting in the early 1970s, Yaconelli edited the religious humor magazine, the Door. Mike was the author of numerous books including Messy Spirituality. Mike's life and work have inspired thousands of people through his writing and speaking. Mike exuded a passion for following Christ and living out that faith in everyday life. See his book, Messy Spirituality (http://www.zondervan.com/Cultures/en-US/Product/ProductDetail.htm?ProdID=com.zondervan.9780310277309), published by Zondervan.