This is GREAT! JMEjr loves this book and we trust CJE will as well. We sell many of these from our church's book kiosk. There is multimedia, downloads, and more so check it out here. They now have two editions. See them here and here (deluxe edition).
Cumberland Valley Bible Bookstore, where I have ordered for a very long time.
Reformation Heritage Books always a favorite of mine.
Westminster Theological Bookstore always offers $5.00 shipping.