What happened at the river last night? A twisty psychological thriller for readers of Megan Miranda, Megan Abbot, Taylor Adams, and Catriona Ward Sometime between the late night and early morning hours, in a dank, uncomfortable interrogation room, sits a young woman about to tell you a chilling story. Her pregnant sister, Sarah, is missing. Her cousin is somehow involved. They were all down by the Schuylkill River last night, she says,...