The coffee is always perfect when Daniel is home. Claire Mercer has spent twelve years building a life that looks effortless—a steady marriage, a town that trusts her, a reputation for warmth she’s perfected down to the smallest detail. Then she finds the receipt. A café in Millfield. Two coffees. A slice of cake. Claire doesn’t confront her husband. She doesn’t ask questions. Instead, she drives to Millfield, parks two blocks away, and starts to watch the woman he’s been seeing. Nora is a primary school teacher—kind, present, impossible not to like. Exactly the kind of woman people let in. So Claire makes sure she’s one of them. Told in Claire’s precise, unsettling voice, STILL WATER is a gripping psychological thriller about control, intimacy, and the quiet ways people disappear inside someone else’s life. Everyone sees the surface. No one sees what’s underneath. For readers of of Gone Girl, The Silent Patient, and Behind Closed Doors.