Lynn and Valerie Constantine are a sister duo known for their work as authors. They specialize in writing psychological thrillers and suspense novels, often collaborating on their projects. Their books have gained popularity for their engaging plots and well-developed characters. The Constantines have published several novels, including The Wife Stalker and The Last Mrs. Parrish. Their writing has been praised for its gripping narratives and unexpected twists, appealing to fans of the thriller genre. They are also active in the literary community, participating in events and discussions related to writing and publishing.