The Secrets of Sir Richard Kenworthy

The Secrets of Sir Richard Kenworthy is a Regency romance written by Julia Quinn and published in 2015 by Avon Books. Quinn's 24th novel is also the final installment of her series known as the Smythe-Smith Quartet. It features Iris Smythe-Smith and the eponymous Sir Richard Kenworthy. The novel reached number 2 on the New York Times Bestseller List and was in the top 10 for the USA Today bestseller list.