Petrus Johannes Franciscus Maria Worm, Piet Worm for short, was born in Alkmaar, The Netherlands in 1909. He studied at the Kunstnijversheidsschool in Haarlem, the School voor Kunst, Techniek en Ambacht in Den Bosch and the Rijksacademie voor Beeldende Kunsten in Amsterdam. He became an illustrator and writer of children’s books, often cooperating with writer Bertus Aafjes on titles such as ‘Peter-kersen-eter’ (1943, “Dit werd gemaakt in fraaie vorm, Door Bertus Aafjes en Piet Worm”). They also made an illustrated history of The Netherlands, called ‘De Vrolijke Vaderlandse Geschiedenis’, which was published in newspaper De Volkskrant in 1948 and in book format in 1958.