Simply Christian: Why Christianity Makes Sense is the first N.T. Wright book that I've read, and he made a pretty good first impression. I expected this book to be somewhat like C.S. Lewis' Mere Christianity, but it's much less apologetic in nature and more of an exposure to a non-Christian of what Christianity is and is not.
I enjoyed Wright's apologetic, although a committed neo-Darwinist atheist would be unpersuaded, I think. The part that was most persuasive, for me personally, was that every society and people group has an idea of justice-- there are wrongs and rights, and everyone has a universal desire to see the wrongs righted. That indicates that we lost something somewhere in the annals of human history, we are all crying out for redemption and justice.
I appreciated Wright's emphasis on the importance of Scripture in the center of our worship-- corporate reading of Scripture is part of Jewish tradition, is prescribed in the New Testament (1 Timothy 4) and is not often done by churches anymore.
Wright walks the reader through God's redemptive story, from creation to the Exodus, to Jesus. It's a brief overview of biblical theology for the non-believer. Wright's politics creep in occasionally, his assumptions of pacifism and international debt forgiveness, for example. But he does not strike me as a liberal heretic.
I give this book 3.5 stars out of 5. I enjoy checking out some of Wright's "deeper" works.