The Shack: Where Tragedy Confronts Eternity - Wm. Paul Young, Brad Cummings, Wayne Jacobsen
Mack, a man whose daughter had been kidnapped and murdered, receives a letter in his mailbox inviting him to spend a weekend at the very shack where his world fell apart four years earlier.

It is at that very shack where Mack comes face to face with God and learns to heal.