It's hard to find anything to disagree with in this book--and that is intended as both a compliment and as, I suppose, a complaint.
The book is quite concise and basic, like several of Wright's more popular-level works (a similar sort of work, for instance, is his Evil and the Justice of God). Of course, being by Wright, concise and basic doesn't mean shallow and simplistic. You can tell this is just the tip of an iceberg, with Wright's enormous erudition and theological imagination lying underneath it, so that you feel like what you're being given is in fact substantial and significant, and not just trite truisms. And, as far as it goes, it's pretty spot-on in everything it says; he handles this controversial subject resolutely yet sensitively, and what he comes down with is, as I said, pretty hard to disagree with at any point.
On the other hand, on a subject like this, laced about with many burning questions about inspiration, inerrancy, the relation of human and divine authorship, how we are to discern the various literary genres in Scripture and the history of the texts, etc., it is a bit frustrating to read through 150 or so pages and find nothing to disagree with. One wishes that he had ventured into some of these discussions and staked out positions on some of the thornier questions, thus provoking at worst a very healthy and fruitful disagreement. I'm finding it necessary to get a much clearer handle on the conservative doctrine of inerrancy and its critics, and so I hoped this book might provide an interesting angle. But although it provided a useful framework to approach such questions, it didn't come close to addressing them.
In short, then, this book serves excellently as a sort of Mere Christianity's Doctrine of Scripture--here's what every Christian who wants to take the Bible seriously ought to be able to affirm, and how they ought to contextualize that confidence in the Bible's authority. As a starting point to establish a point of unity among rival factions, then, this is great. But a guide to resolving the disputes between those factions, it most certainly is not.