A voice on the monitor. A law on the fridge. When the baby monitor crackles at 3:17 a.m., Clara hears a voice she hasn't heard since she was born: her twin, Eleanor. Everyone else hears interference. Clara hears rules: no water; no doors; mat only; left-right. With her partner, Mark, and a no-nonsense safeguarding officer, Clara turns the haunting into a contract-witnessed, documented, enforceable. The house responds: knots on the hall mat, one tap on the door, a boat drawn in steam. Proof accrues in pencil lines and hospital labels-bands printed for two babies, one neatly voided. As the past sharpens into evidence, Clara must choose: cling to a ghost as a person, or keep what's owed as law. Her daughter's safety is non-negotiable. The rules hold-until the night the window that stayed locked is tested from the outside. The Silent Twin is a taut, deeply human thriller about love, language and the bureaucratic magic of boundaries. Perfect for readers of psychological suspense who like their hauntings grounded, their twists earned and their endings brave.