Christianity Today just published an interview with N. T. Wright focusing on the material and methods of his new book. 
When I first read Simply Christian I found the apologetic in the first four chapters rather weak. This article clarifies Wright’s apologetic method–not A plus B equals C, but painting the power of a compelling story of which we are all a part, for everlasting good or ill. The latter half of the book, in my opinion, is a good introduction to biblical theology.
Here are a few quotes from the article:
On his “postmodern” method over and against the “modernist” approach of C. S. Lewis:
“And if the argument has a compelling force, it’s not the force of A plus B equals C, where there’s no escape. I want you to try seeing yourself as part of the picture that we’ve painted. Or try humming one of the parts of this symphony that we’re writing, and see if it doesn’t make an awful lot of sense while nonetheless being very challenging.”
On defunked approaches to knowing God:
“In other words, don’t assume that you’ve got God taped, and fit Jesus into that. Do it the other way. We all come with some ideas of God. Allow those ideas to be shaped around Jesus. That is the real challenge of New Testament Christology.”
On the worship & the mission of the Church:
“Because the great emphasis in the New Testament is that the gospel is not how to escape the world; the gospel is that the crucified and risen Jesus is the Lord of the world. And that his death and Resurrection transform the world, and that transformation can happen to you. You, in turn, can be part of the transforming work.”
“The key to mission is always worship. You can only be reflecting the love of God into the world if you are worshiping the true God who creates the world out of overflowing self-giving love. The more you look at that God and celebrate that love, the more you have to be reflecting that overflowing self-giving love into the world.”