In Agatha Christie's Autobiography, she claims that Quin and Satterthwaite became two of her favourite characters.
The Love Detectives, The Harlequin Tea Set, Three Act Tragedy (a Poirot story in which Satterthwaite makes an appearance) and Dead Man's Mirror were included in the collection The Complete Quin and Satterthwaite: Love Detectives (UK, HarperCollins; ISBN 978-0-00-717115-6).