The Shack by William P Young
Mackenzie Allen Phillips's youngest daughter, Missy, has been abducted during a family vacation. 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. Against his better judgment, he arrives at the shack on a wintry afternoon and walks back into his darkest nightmare. What he finds there will change his life forever.