Quicklets: Learn more. Read less. The Shack is a powerful story of the transformation of a bitter, grieving father into a man of God with a heart full of love and forgiveness. Told by Willie, the loyal, though skeptical, best friend of Mackenzie Allen Phillips, The Shack begins in the midst of Mack's "Great Sadness", which descended on him following the abduction and apparent murder of his six-year-old daughter Missy. Ravaged by grief and guilt, he lives with a darkness that threatens to consume him and his relationship with his wife Nan and their other five children. Then, on an icy winter day, Mack receives a strange invitation to "Meet me at the shack this weekend. Love, Papa." Trembling with both fear and anticipation, Mack goes back to the hated scene of his personal hell where, instead of his abusive father, he encounters God in the strangest forms he could have imagined. An international best-seller; The Shack has sold over 14 million copies; has been translated into Spanish, German, and Croatian; and can be found in paperback, hardback, CD, Kindle, and Audible Audio.