Stephanie was born in England before emigrating to Australia - and later New Zealand - with her family, where she trained as a nurse. Whilst back in England on holiday, she met and married her husband, had a daughter and settled down.

Stephanie's lifelong interest in writing became more serious when her first children's book, Avalanche, was published in the 1980s. Since then, she has had around forty children's books published, and has also published an historical novella for adults. Stephanie works closely with schools, she tutors for two writing schools and occasionally runs writing workshops for adults.

Stephanie joined Sweet Cherry Publishing in 2013 with her Mr Pattacake series, and she has since written The Dinosaur Detectives.

Stephanie currently lives in the Chiltern Hills in Buckinghamshire.