This was Jones's final attempt to sum up the message of his ministry. Jones saw early on that if the Kingdom of God was the central emphasis of Jesus then as an evangelist for Jesus the Kingdom must become his own central emphasis as well. With the Kingdom as his guiding light Jones devoted his ministry to working out the principles of that Kingdom and unashamedly applying them to the world he saw around him. Two earlier books, Is the Kingdom of God Realism? and Christ's Alternative to Communism lay out the foundations of his view in a more clear and radical manner. But this is mainly because of the context in which they were written (the mid-twentieth century) where the ideologies competing for the world's loyalites could be so clearly contrasted (Fascism, Nazism, Communism). The Unshakable Kingdom book comes out of a less conflicted time and loses some of its edge because of that; and yet it remains a good place to start in understanding what Jones was about. The core of his written work will always remain the daily devotionals, which as Howard Snyder once pointed out are really manuals for radical discipleship. Jones was not a theologian and this book is not really a work of theology at all. But there are many theologians who have written about the Kingdom for many years and from many angles and have missed many of the points that Jones makes clear in this book.