Julia Donaldson has written some of the world's best-loved children's books, including modern classics The Gruffalo and The Gruffalo's Child, which together have sold over 25 million copies worldwide and have been translated into over one hundred languages. Her other books include Room on the Broom, Stick Man and Zog, illustrated by Axel Scheffler, The Hospital Dog, illustrated by Sara Ogilvie and the hugely successful What the Ladybird Heard adventures, illustrated by Lydia Monks. Julia also writes fiction, including the Princess Mirror-Belle series, illustrated by Lydia Monks, as well as poems, plays and songs – and her brilliant live shows are always in demand. She was the UK Children’s Laureate 2011–13 and has been honoured with a CBE for Services to Literature. Julia and her husband Malcolm divide their time between West Sussex and Edinburgh.

Lydia Monks is one of the most original and bestselling picture book artists working today. Lydia illustrates several bestselling series including the What the Ladybird Heard adventures and Princess Mirror-Belle, written by Julia Donaldson. Her distinctive use of colour and collage has won her critical acclaim and several awards, including the Royal Mail Scottish Children’s Book Award, the Stockport Children’s Book Award and multiple nominations for the Kate Greenaway Medal. Mouse’s Big Day, written and illustrated by Lydia, is the first book in her Twit Twoo School series. Lydia lives in Sheffield.