Check out this book: Chad Van Dixhoorn, Confessing the Faith, Banner of Truth.

The Westminster Confession of Faith is the finest confessional statement of Christian doctrine ever written. In this book, Dr Van Dixhorn explains the Westminster Confession of Faith simply and clearly. In the Foreword, Prof Carl Trueman writes, "this guide is a true gem. It deserves to be the standard reference book for any pastor seeking to use the Westminster Standards in his ministry. It should be the first volume for which any Sunday School teacher reaches when asked to do a class on the Confession. It should be the constant companion of all elders. Indeed, it should be on the bookshelves of anyone interested in learning more deeply about the riches of the Reformed ... faith. Enjoy--and learn." I would add that any Christian who wants to grow in his or her understanding of their knowledge of God and of the Christian Faith should read this book.  Look inside at: 
https://banneroftruth.org/media/flippingbook/ConfessingtheFaith/confessingthefaith.html#2