We need to keep things in perspective. As far as Scripture is concerned, I have personally studied the Word for many years and have not followed any man-made doctrines. This should be the underlying principle for all Christians. We are personally responsible and accountable for our beliefs.
As far as anything else such as books, periodicals, articles, web sites, etc. if we know from other sources that they have rubbish, we don't need to waste time on this kind of information. When the Shack came out years ago, it was assessed by many Christians, and found to be seriously deficient in presenting Bible truth, and misrepresenting the Gospel.
The Shack: A Pastoral Review of the Popular Novel