Young, William Paul "The Shack" - 2007
Even if you're not into spiritual books, this one is extraordinary. A man has to come to terms with the death of his daughter. He receives a mysterious invitation to a meeting in a shack. He drives there and meets three special people.
This book describes the way to God in such a brilliant way that it will be around for generations. Certainly one of the books that make the most impression on anybody. It might still leave you with more questions than answers but if will make you think.
From the back cover:
"Mackenzie Allen Philips' youngest daughter, Missy, has been abducted during a family vacation, and evidence that she may have been brutally murdered is found in an abandoned shack deep in the Oregon wilderness. Four years later in the midst of his 'Great Sadness', Mack receives a suspicious note, apparently from God, inviting him back to that shack for a weekend."