An unreliable narrator can hide a twist that lurks throughout the story, only to be revealed at the end. But Christie's twist ending made readers question Sheppard's role as the narrator, leading to controversy, as some readers felt tricked by the author's unique way of telling the story. Atonement by Ian McEwan'Atonement' by Ian McEwan | Vintage / AmazonSometimes the unreliable narrator doesn't realize they're unreliable, such as Briony Tallis in Ian McEwan's Atonement. It also doesn't help when the narrator's true identity—and mental state—are revealed at the end, forcing the reader to rethink the story through the now-unreliable narrator's lens. The success of the 2015 book even led to an unreliable narrator trend through the latter half of that decade, including books like The Woman in Cabin 10 and The Woman in the Window.