Laura Dockrill, a graduate of the Brit School of Performing Arts, is a performance poet, an author and an illustrator. At the age of twenty-two, she was named one of The Times’ "Top Ten Literary Stars".

She is the author of the bestselling Darcy Burdock series and Lorali. Angry Cookie is her debut picture book.

Maria Karipidou studied Communication Design, and has since illustrated a number of children's books, working mostly with French and German publishing houses.

In 2015, she received the Leipziger Lesekompass Award at the Leipzig Book Fair. Angry Cookie is her first book with Walker. She currently lives and works in Karlsruhe, Germany.