I finished this book in one sitting because I couldn't put it down. It's a quick but very powerful read. It's one of those books that you think about for days after reading it. I felt the same way about The Shack which I recommend to friends all the time. I bought my copy of Heaven is for Real at Costco which was a great deal and I definitely plan to buy several copies as Christmas gifts. There is an excerpt of the book available on their website http://heavenisforreal.net/
I hope you'll check it out and let me know what you think.