I really enjoyed The Shack because it was really mysterious and you could never predict what was going to happen next. As I was reading, I really never got bored and that is unusual for me because I am not an avid reader.
I strongly suggest this book to people who do not really understand religion. I am Catholic but I do not attend church at all. I do believe in God but I would not say I have a relationship with Him. This book made my understanding of religion so much clearer and I actually liked it. I would also suggest it to people who like sad books with happy endings; you would not be disappointed.