Wendy Lee has written many projects for television, for both children and adults, but Leon Spreads His Wings is her first published book. She lives in London.

Petr Horacek is a graphic designer, illustrator and painter. He is the author of the Books for Children Newcomer Award-winning Strawberries Are Red (9780744575767) and What Is Black and White? (9780744575774), as well as Silly Suzy Goose (9781406304589). Born in Czechoslovakia, Petr now lives in Worcestershire with his wife and two daughters.