Tim Challies has written a lengthy review of The Shack by William P. Young. The review begins with this paragraph:
 
I am certain that there is no other book I’ve been asked to review more times than William P. Young’s The Shack, a book that is currently well within the top-100 best-selling titles at Amazon. The book, it seems, is becoming a hit and especially so among students and among those who are part of the EmergentChurch. In the past few weeks many concerned readers have written to ask if I would be willing to read it and to provide a review. Because I am always interested in books that are popular among Christians, I was glad to comply.
 

 
Here are some comments from the review’s conclusion:
 
So where does all of this leave us? It is clear to me that The Shack is a mix of good and bad. Young teaches much that is of value and he teaches it in a slick and effective way. Sadly, though, there is much bad mixed in with the good. As we pursue his major theological thrusts we see that many of them wander away, by varying degrees, from what God tells us in Scripture.
 
Despite the great amount of poor theology, my greatest concern is probably this one: the book has a quietly subversive quality to it. Young seems set on undermining orthodoxy Christianity. For example, at one point Mack states that, despite years of seminary and years of being a Christian, most of the things taught to him at the shack have never occurred to him before. Later he says, “I understand what you’re saying. I did that for years after seminary. I had the right answers, sometimes, but I didn’t know you. This weekend, sharing life with you has been far more illuminating than any of those answers.”
 
Eugene Peterson says this book is as good and as important as The Pilgrim’s Progress. Well, it really is not. It is neither as good nor as original a story and it lacks the theological precision of Bunyan’s work. But really, this is a bit of a facile comparison. The Pilgrim’s Progress, after all, is allegory—a story that has a second distinct meaning that is partially hidden behind its literal meaning. The Shack is not meant to be allegory. Nor can The Shack quite be equated with a story like The Lion, the Witch, and the Wardrobe where C.S. Lewis simply asked (and answered) this kind of question: “What might Christ become like if there really were a world like Narnia, and He chose to be incarnate and die and rise again in that world as He actually has done in ours?” The Shack is in a different category than these more notable Christian works. It seeks to represent the members of the Trinity as they are (or as they could be) and to suggest through them what they might teach were they to appear to us in a similar situation. There is a sense of attempted or perceived reality in this story that is missing in the others. This story is meant to teach theology that Young really believes to be true. The story is a wrapper for the theology. In theory this is well and good; in practice the book is only as good as its theology. And in this case, the theology just is not good enough.
 
Because of the sheer volume of error and because of the importance of the doctrines reinvented by the author, I would encourage Christians, and especially young Christians, to decline this invitation to meet with God in The Shack. It is not worth reading for the story and certainly not worth reading for the theology.
 
To read the entire review, go here.