Perdita and Honor Cargill are a mother/daughter writing partnership and the authors of the series Waiting for Callback. Originally from the Scottish Highlands, Perdita spent many years as a lawyer before turning to writing fiction. Honor, having recently graduated from Oxford, is working on fiction and non-fiction writing projects as well as studying for a masters degree at the Courtauld Institute of Art. They both live in London.

Katie Saunders knew she wanted to be an illustrator when she had a picture published in Twinkie Magazine at the age of five. Katie worked as a teacher before becoming a full-time illustrator. Katie lives in Kent with her partner, two children, two cats, and a crazy sausage dog named Rolo.