https://answersingenesis.org/reviews/movies/staying-outside-the-shack/
http://www.challies.com/wp-content/uploads/2017/02/The-Shack.pdf
http://www.albertmohler.com/2010/01/27/the-shack-the-missing-art-of-evangelical-discernment/
The Shack is a wake-up call for evangelical Christianity. An assessment like that offered by Timothy Beal is telling. The popularity of this book among evangelicals can only be explained by a lack of basic theological knowledge among us — a failure even to understand the Gospel of Christ. The tragedy that evangelicals have lost the art of biblical discernment must be traced to a disastrous loss of biblical knowledge. Discernment cannot survive without doctrine. ~ Mohler, on the book.