Wow. What a truly amazing book. As the saying goes, if you're only going to read one book this year, The Shack should be the one. I just finished reading it on my Kindle and I can't tell you the last time I was this inspired by a book.
What's so special? It's the only book I've ever read that personalizes God. More specifically, this riveting story paints a fascinating picture of each element of The Trinity, all in human form. As a parent it was tough to read at times...I won't go into the reason why here...you'll just have to read it for yourself.
The mental images from The Shack will probably be the lens through which I will read every other book on Christianity in the future. That's saying a lot but it still doesn't do this book justice. Buy it and read it. You won't regret it.