Best-selling author J. I. Packer, one of the most influential evangelicals of our day, has put together what may become a Christian classic on the vital truths of the faith. Serving to nourish the church worldwide, Packer makes accessible the things we need to know in eight essential areas. This concise book also helps us guard against liberalism by pushing Christians to know their faith so they can explain it to inquirers and sustain it against skeptics. Here is a call to a discipleship in mere Christianity—the business of taking God seriously.