The Kingdom of God (Thomas Schreiner)
Credo Magazine contributor Thomas Schreiner has written many books, but one of his most important of late is The King in His Beauty: A Biblical Theology of the Old and New Testaments. If you are looking to gain a better grasp of the big picture of the Bible and each particular book in the Bible, we highly recommend this book.
Here is a video where Schreiner explains why the theme of kingdom is so central to the Bible: