No. 7. Mystery Behind The Walls is a book that features Terry Scroggins, a veteran Texas game warden that gets involved in the investigation of what he suspects to be a drug cartel. After the death of his partner, he realizes that this operation is much larger than he thought and feels threatened for his life and the lives of his immediate family. This novel is a "who done it" book that will keep you on the edge of your seats with suspense.