The first rule of combat is: know your enemy. We don't talk a lot about sin these days. But maybe we should. The Puritans sure did--because they understood sin's deceptive power and wanted to root it out of their lives. Shouldn't we want the same? Though many books have been written on the "doctrine of sin," few are as practical and applicable as this one. In Knowing Sin, Mark Jones puts his expertise in the Puritans to...