For readers of Megan Miranda, Megan Abbot, Taylor Adams, and Catriona Ward, a twisty psychological thriller about sisters, family, and the friend we would do anything for Sometime between the late night and early morning hours, in a dank, uncomfortable interrogation room, sits a young woman with a chilling story. Her pregnant sister, Sarah, is missing. Her cousin Jeremy is in an adjoining room. She is cold, terrified, and confused about what happened earlier last night. But the police, instead of trying to help her get her sister back, keep asking about her ex-flatmate, Gemma. Gemma, who came into their lives offering a six-month cash deposit up front, disrupted their routines with her manipulative behavior, her secrets, and her bizarre habits—like salt sprinkled outside her door, the chanting and whispering coming from her room at night, the candles, her irregualr comings and going as if in search of someone—only to disappear quietly several months ago, leaving them to deal with the fallout. Did something sinister happen to Gemma? What does it have to do with Sarah’s disappearance? Are they part of some trickster’s elaborate game, or is something else going on? And what really happened by the river last night? From the author of They Did Bad Things, Gemma is a devious new mystery and slowly escalating psychological thriller with a touch of horror.