Rodoula Pappa is a writer and translator of children's books. Her first book, The Boy with the Tree, was awarded the Greek National Prize for Children's Literature. She is cofounder of the Volatilium and Tsalapeteinos children's book imprints. Seng Soun Ratanavanh is a French illustrator and painter. She graduated from the National School of Fine Arts (ENSBA, Paris), and she regularly exhibits her paintings and drawings in France and aboard.