Dub (David) Leffler is one of thirteen children and grew up in the small town of Quirindi, south of Tamworth in New South Wales. He is descended from the Bigambul and Kamilaroi (Gomeroi ) people of south-west Queensland and of Syrian, French and Irish descent.
He began his visual arts career as an animator, and worked as a muralist and art teacher. He has illustrated several children's books and has collaborated with internationally recognised illustrators. Once There was a Boy was the first book that Leffler has written and illustrated. (Source: Magabala Books website; My Book Corner website)