Sonia Purnell is a British writer and journalist with a career spanning major British publications including The Economist, The Daily Telegraph, and The Sunday Times. Purnell is best known for her biographical works. Her book Clementine: The Life of Mrs. Winston Churchill received significant critical acclaim, being chosen as book of the year by both The Telegraph and The Independent. The work was also a finalist for the Plutarch Award, a recognition of excellence in biographical writing. In addition to her work on Churchill's wife, Purnell has written The Kingmaker, a biography of Pamela Harriman.