Amazon.com description: Product Description: This in-depth approach to discipleship is designed for young people who want to experience and radiate the core of heart commitment to Christ. The ULTIMATE CORE is grounded in the ageless principles taught in the Sermon on the Mount. Relevant chapter topics range from purity to spiritual gifts to evangelism and offer insights to empower and challenge older teens and twenty-somethings to become effective, powerful Christians for this millennium. Written by Winkie Pratney and Trevor Yaxley, two youth ministry and evangelism experts.