Rachael Davis studied mathematics at Oxford University and went on to work in finance. When her mother was diagnosed with terminal cancer Rachael decided life was too short not to do what you love. She left her job, did a masters in English Literature at Surrey University, became a full-time writer and has never looked back. Rachael is passionate about showcasing diversity and mental wellness in her writing. She lives in Hampshire with her husband and two young daughters.

Mike Byrne grew up on the Wirral near Liverpool before moving to Wales to study Illustration at Glyndwr University. He began his career as a designer for a greetings card company and then became a studio manager for a licensed stationery designer before leaving to fulfil his dream of illustrating children's books.

Mike now lives in Surrey with his wife, cat and two sons where he spends his days doodling and illustrating children's books fuelled only by tea and biscuits. Mike illustrated the Jack's Mega Machines series for Simon & Schuster. The Return of Sproutzilla is his fourth title with Macmillan