B.A. Paris (pen name) is a Franco-British writer of fiction, mainly in the psychological thriller subgenre. Her debut novel, Behind Closed Doors (2016), was a New York Times and Sunday Times bestseller. It has been translated into 40 languages and has sold more than 3.5 million copies worldwide. Her other books include The Breakdown (2017), Bring Me Back (2018), The Dilemma (2019) and The Therapist (2021). She is published by HarperCollins Publishers in the UK and St Martin's Press in the US.