In my previous list I had 8 books by 7 authors, so I need to add four more books:
The fact that these books come easily to mind suggest their significance in my reading:
Hans Kung: Does God Exist? and On Being ChristianThere, that's 4. I was also impressed with Carl Henry's God Revelation and Authority, and plan to re-read it...one day. I also have fond memories of Helmut Thieleke's The Evangelical Faith (and plan to read Michael Bird's book of the similar name Evangelical Theology).
Frederick Dale Bruner: A Theology of the Holy Spirit
Donald Crowe: Creation without Compromise
I know Kung has some aberrant ideas, but those books did fuel a lot of thought for me, and they were a breath of fresh air in the arid intellectual environment of the church I was in during my early 20s.