In the story, Jesus is portrayed in the form of a Jewish man who admits that he isn't really THE way, THE truth, and THE life, but perhaps the BEST way to God.
God the Father is portrayed as a black female who says SHE has devotees of many beliefs, many religions, many faiths.
When the central character asks "god" what it means to be a Christian, "god" says: “'Who said anything about being a Christian? I’m not a Christian."
Anyone familiar with the Word of God and the "wiles of the devil" need read no further, that would be enough. For everyone else, read on:
The Shack is a work of fiction that very cleverly challenges the Biblical tenets of Christianity. It is an entertaining story that holds the reader's attention as an easy read, but it subtly undermines the Christian faith by reinventing God and his Son Jesus into something that is not recognizable from the Bible. The God portrayed in this book is NOT the God of the Bible. The “Jesus” of The Shack is NOT Jesus Christ of the Bible, because the "god" of The Shack speaks things that are diametrically opposed to the holy Scriptures.
This is nothing more than another Satanic assault on the God of the Bible, redefining and belittling the central doctrines of the fall of man and the redemption accomplished in the bloody atonement of Jesus upon a cruel cross on Golgotha.
If this story had been about Allah, if Allah were portrayed as a white female, the author would have hell to pay. Yet there are obviously no lengths too vulgar to be hurled against Christianity.
The writer of Galatians considered altering the Gospel so serious that he states his warning twice in one place:
As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed."