"The Wife Between Us" is a psychological thriller novel by Greer Hendricks and Sarah Pekkanen. The story revolves around a complicated love triangle involving Vanessa, an ex-wife, and Nellie, the new fiancée of Richard, Vanessa's former husband. As the narrative unfolds, secrets and unexpected twists reveal the true nature of their relationships. The book explores themes of obsession, betrayal, and the complexities of marriage. It challenges readers' perceptions of the characters, leading to surprising revelations about their motivations and pasts. The intricate plot keeps readers engaged, making it a compelling read for fans of suspenseful fiction.