Hi JTD,
I see you already have a variety of good book recommendations! I was perusing through and some titles look excellent. To throw my lot in with all the suggestions, I would highly recommend:
The New Testament: An Introduction to its Literature and History; J. Gresham Machen. It is an excellent exegetical delve into all the NT books, and one I finished reading not too long ago.
Knowing God; J. I.Packer. I can't begin to say how good and insightful this book is! It opens with a wonderful quote from Charles Haddon Spurgeon, a sermon he preached about the sovereignty of God, and Packer's beginning rallying cry in Chapter 3:
What were we made for? To know God.
What aim should we set ourselves in life? To know God.
What is the "eternal life" that Jesus gives? Knowledge of God. "This is what the LORD says: "Let not the wise man boast of his wisdom or the strong man boast of his strength or the rich man boast of his riches, but let him who boasts boast about this: that he understands and knows me'" (Jer 9:23-24)++
Packer's theme runs like this:
What makes life worthwhile is having a big enough objective, something which catches our imagination and lays hold of our allegiance; and this the Christian has in a way that no other person has. For what higher, more exalted, and more compelling goal can there be than to know God?++
Packer explains the difference of merely knowing "about God" (a kind of intellectualism that has little, if any, impact on the individual's life to the glory of God) to the desired position of intimate relationship, a knowing that comes through direct experience of His presence in one's life, only through the grace of His Holy Spirit upon the heart, thus truly impacting the life and motivating one to live it to the God from whom are all things and to whom are all things. How humbling a thing to realize that, to say in earthly terms, such a great Personage should so desire to take undeserving Christians into His confidence! May He be glorified now and always!! :amen
In Him,
~Fay L.