J.P. Delaney is a British author known for his psychological thrillers. He gained popularity with his debut novel, *The Girl Before*, which explores themes of obsession and control within a mysterious house. His writing often features intricate plots and well-developed characters, keeping readers engaged and guessing until the end. Delaney has a background in advertising and has worked as a copywriter before turning to fiction. His books have been translated into multiple languages and have received positive reviews for their suspenseful storytelling. He continues to write, contributing to the genre of contemporary thrillers.