Review: The Grownup by Gillian Flynn is a sharp, unsettling novella that showcases her signature ability to weave psychological tension and dark humor into a tightly wound narrative. The story follows a cynical, unnamed narrator who makes a living as a scammer, posing as a psychic to con vulnerable clients, until she encounters a client with a supposedly haunted house and a troubled teenage stepson. What begins as a ghost story quickly shifts into something more ambiguous and sinister, with Flynn blurring the line between supernatural dread and psychological manipulation. Despite its brevity, the novella packs in vivid characterization, witty, biting prose, and the kind of unexpected twists that make Flynn’s work so addictive. Its strength lies in how much it leaves unresolved, forcing readers to question who is lying, who is dangerous, and whether the haunting is real or imagined. Dark, clever, and perfectly unsettling, The Grownup proves that Flynn can deliver chills and intrigue in just over sixty pages, making it a must-read for fans of her twisted storytelling style.