Secrets, betrayal, and jealousy are at the heart of a friendship in an unnerving short story about truth and self-deception by Caroline Kepnes, the New York Times bestselling author of You.

Ellen has a lot to be thankful for. Her fiancé, Troy, is perfectly sweet. Her childhood friend Tanya, despite her edgier taste in men, is like a sister to Ellen: her closest friend—and rival. So familiar and yet, over the years, so many secrets between them. For Ellen, what lies ahead is a series of choices that will add up to a life she never could have imagined.

Caroline Kepnes’s The Bad Friend is part of Never Tell, a heart-pounding collection of stories about secrets, lies, and mind games. They can be read or listened to in one sitting. Just keep the endings to yourself.