Cathryn Sterling was working as a NASA engineer when God called her into ministry and full-time parenting. As an engineer, Cathryn saw firsthand the importance of explaining Christian truths in a logical way. She founded Defend the Faith Ministry, wrote her book, Teaching Others to Defend Christianity, and co-authored Mama Bear Apologetics to equip believers to defend the truth of Christianity. Cathryn now homeschools her two children and teaches upper-level math at her homeschool group. Learn more at www.defendthefaithministry.com.