This is a book that appears simple until you really start thinking about the issues being discussed. As a member of a Southern Baptist church, I'm accustomed to accepting the superiority of biblical authority as a given. Wright goes a step further, asking what "the authority of Scripture" actually means. In a very small book, he manages to explore this issue theologically and practically.
It would be dishonest to say that I enjoyed the whole thing, because his prose is a bit dry at points, but I was challenged thoroughly and feel as if I have a better understanding of the issue and of my own approach to it. I think Wright would be happy with that.