From the New York Times–bestselling author of Reese's Book Club pick The Last Mrs. Parrish comes two domestic thriller novellas, including My Sister's Daughter, the basis for Lifetime Original Movie Don't Trust the Girls Upstairs.

In My Sister's Daughter, Ashley Bowers hopes her recently orphaned thirteen-year-old niece, Serena, will blend seamlessly into her own family once they've all had time to mourn. But as days become weeks, a series of troubling occurrences turn the once-peaceful Bowers home into a maelstrom of accusation, denial, and fear. Is Serena simply acting out after the tragic loss of both her parents? Or is something far more dangerous happening under Ashley's own roof?

A year after the death of her four-year-old son, Silent Echo's Charlotte Fleming is sleepwalking through life. Then she sees something that jolts her awake: Sebastion, alive and well in a stranger's social media post. As Charlotte obsessively searches for further indication that her son's accident was not what it seemed, she begins to suspect not only didn't he die—he was taken. And unearthing the perpetrator could shatter her world all over again.

Hailed for her taut, psychological thrillers, New York Times–bestselling author Liv Constantine takes readers to the depths of paranoia and the heights of the chase in this gripping pair of novellas guaranteed to shock and surprise you.