Antonis Papatheodoulou was born in Athens. He has published more than 50 books for children, some of which have been translated into eleven languages and which have won many awards, including two Greek State Picture Book Awards and the 2016 International Compostela Prize. Five of his books have been included in the White Ravens list of the International Children's Library of Munich. He has been a candidate for the 2019 Astrid Lindgren Memorial Award.Iris Samartzi is a children's book illustrator and an art teacher. Her work has received many awards, including the 2016 International Compostela Prize for Picture Books, the Greek State Picture Book Award (2012, 2016) and the Greek IBBY Award (2012, 2015, 2016 and 2017). When she is not illustrating books, she runs art workshops for children. She lives and works in Athens, Greece.

She is nominated for the Hans Christian Andersen Award 2020.