It's been said that all great literature boils down to one of two stories—a man takes a journey, or a stranger comes to town. While mystery writers have been successfully using both approaches for generations, there's something undeniably alluring in the nature of a stranger: the uninvited guest, the unacquainted neighbor, the fish out of water. In the newest collection of stories by the Mystery Writers of America, each author weaves a fresh tale surrounding the eerie feeling that comes when a stranger enters our midst, featuring stories by prolific mystery writers.

Probationary constable Peter Grant dreams of being a detective in London's Metropolitan Police. Too bad his superior plans to assign him to the Case Progression Unit, where the biggest threat he'll face is a paper cut. But Peter's prospects change in the aftermath of a puzzling murder, when he gains exclusive information from an eyewitness who happens to be a ghost. Peter's ability to speak with the lingering dead brings him to the attention of Detective Chief Inspector Thomas Nightingale....

Sam Acquillo is at the end of the line: he's a middle-aged corporate dropout living in a ramshackle cottage in Southampton's North Sea. But then the old lady next door ends up floating dead in her bathtub, and it seems that Sam is the only one who wonders why.

Ex-St. Paul cop Rushmore McKenzie has more time, and more money, than he knows what to do with. In fact, when he’s willing to admit it to himself (and he usually isn’t), Mac is downright bored. Until he decides to do a favor for a friend facing a family tragedy: Nine-year-old Stacy Carlson has been diagnosed with leukemia, and the only one with the matching bone marrow that can save her is her older sister, Jamie. Trouble is, Jamie ran away from home years ago.

Northern Ireland, spring 1981. Hunger strikes, riots, power cuts, a homophobic serial killer with a penchant for opera, and a young woman’s suicide that may yet turn out to be murder: on the surface, the events are unconnected, but then things—and people—aren’t always what they seem. Detective Sergeant Duffy is the man tasked with trying to get to the bottom of it all. It’s no easy job—especially when it turns out that one of the victims was involved in the IRA but was last seen discussing business with someone from the loyalist Ulster Volunteer Force.