#55 The Shack by William Paul Young

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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.

Thought provoking story. I'll have to check out the movie version.