Vivian French is a highly acclaimed children's author who has written more than 250 books during the course of her career, including Caterpillar, Butterfly, The Tales from the Five Kingdoms series and Yucky Worms.

Her recent work includes the critically acclaimed picture book The Most Wonderful Thing in the World and junior fiction The Adventures of Alfie Onion, The Cherry Pie Princess and The Witches' Midnight Feast.

Vivian teaches on the illustration course at Edinburgh School of Art, and helped to found the mentoring scheme Picture Hooks for aspiring young illustrators. She lives in Edinburgh

Sarah Gibb is a London-based illustrator.

After landing regular spots in the Telegraph and Elle Magazine, Sarah has gone on to illustrate Sue Townsend's Adrian Mole series, many classic children's fairytales and even the Harrods Christmas window display.