For seniors who need a comfortable place to live, SeniorSource fits the bill. Zero-g, medical care, even a work exchange program for those who can’t afford it otherwise. For one former NYPD detective, SeniorSource provides a lifeline. But if he fails to solve his latest case—the murder of a young boy on the Moon—in 24 hours, he might find himself downgraded, or worse, back on Earth. In other words, dead. “Kristine Kathryn Rusch is one of the best writers in the field.” —SFRevu