The Crystal Cavern by author Hannah Alexander is a memorable, page-turning story. Join Sable Chamberlin and Paul Murphy on a quest to unravel the secrets of the caves beneath Sable's home. What mystery did her grandfather stumble upon before his untimely death? Will they be able to find out in time, or will they die trying? In Agatha Christie tradition, the story finds Sable and Paul trapped in a house with a suspicious group of strangers, many with their own set of secrets. Someone is sabotaging Sable and Paul's efforts to get to the bottom of the mystery, bringing them to the brink of disaster. Will they escape this villain's clutches, before it is too late?