Mo Hayder, internationally best-selling author of "Skin" and "Gone," has firmly established her reputation as a master of gritty, gripping page-turners. Fast-paced and addictive, her latest, "Hanging Hill," centers around a pair of estranged sisters, one a policeman, and the gruesome homicide of a teenage beauty which leads them deeper than they ever anticipated into an underground world of sex and violence. One morning in picture-perfect Bath, England,...