Jesus quoted Deuteronomy more than any other book in the Hebrew Bible. By reading Deuteronomy, it's easy to see why. While it is true that most of the book and the center of the book are occupied with laws (Deut. David Sanford's book and Bible projects have been published by Zondervan, Tyndale, Thomas Nelson, Doubleday, Barbour and Amazon.
But I have found that several writers mention that the most cited books in the Gospels are Deuteronomy and Psalms. Keeping the law in the book of Deuteronomy is a response to God's grace and not a means of earning God's favor. Matthew, Mark, Luke, John, Philip, Peter, Paul and Jesus quoted from the prophecies of Isaiah many times more than all the other prophets combined. Jesus quotes the Scriptures many times, giving us a great example of why memorizing and quoting the Scriptures is edifying for the believer.
So remarkable are the predictions of Isaiah that the New Testament cites the prophecies of Isaiah many times more than all the other prophets combined. They directly quote 30 of the chapters of Isaiah, and indirectly cite eight more, for a total of 38 of the 66 chapters of Isaiah. Therefore, in the book of Deuteronomy, the law is surrounded by grace, and keeping the law is a response to grace received and anticipated. For believers today, the meaning of the book of Esther is that it coordinates with the rest of the Old Testament to presage Jesus as deliverer and mediator of God's people.
In addition, I find it fascinating that Zechariah, probably the darkest and most inscrutable book in the Old Testament, occupies a higher place than any other prophetic book except Isaiah. Second, Jesus used the book of Deuteronomy in his own life more than any other book in the Old Testament. Since the person of Jesus is at the very heart of the gospel and Deuteronomy was so important in his life, it should not be difficult to find the gospel in this last book of the Pentateuch of Moses.