Mere Christianity – C. S. Lewis
If you have never read this book then you need to get it as quickly as possible and read it. It might just be C. S. Lewis’ best ever work. He is not seeking to answer every theological question ever, but he does present a case for believing in Christ and then showing how we should act and live in light of that belief. Countless numbers before have been impacted by this book and I know many will benefit from it in the years to come as well.