Gwendolyn Hooks is the author of Tiny Stitches: The Life of Medical Pioneer Vivien Thomas, which received an NAACP Image Award for Outstanding Literary Work for Children. Hooks was born in Savannah, Georgia, and thanks to her Air Force dad, she also lived in Texas and Washington in the United States, and Italy. After teaching middle school math, Hooks decided to follow her passion to write books for children. Since then she has written several popular early readers for Stone Arch Books (Capstone), Just for You! (Scholastic), andBebop Books' (Lee & Low). Hooks lives in Oklahoma City, Oklahoma, with her husband.

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