Kidnapping 402 Mystery fiction 52 Large type books 46 Murder 41 Suspense fiction 37 Man-woman relationships 34 Missing persons 34 Investigation 31 Crimes against 29 Police 29 Electronic books 28 Romantic suspense fiction 20 Private investigators 19 Intelligence officers 14 Revenge 14 Secrecy 13 Adventure stories 12 Government investigators 12 Psychological fiction 12 Fantasy fiction 11 Kidnapping victims 11 Magic 11 Missing children 11 Mothers and daughters 11 Fathers and daughters 10 Women private investigators 10 Conspiracies 9 Nobility 9 Women 9 Women detectives 9 Assassins 8 Cold cases (Criminal investigation) 8 Extortion 8 Historical fiction 8 Love stories 8 Officials and employees 8 Family secrets 7 Fantasy 7 Parental kidnapping 7 Sisters 7 Americans 6 Children 6 Cross, Alex (Fictitious character) 6 Families 6 History 6 Identity (Psychology) 6 Journalists 6 Organized crime 6 Orphans 6 Undercover operations 6 more ...