The Belgian-born author Raoul Cauvin was a prolific author and, at the time of his death in 2021, was still writing several series at the same time. In 2006 alone, he had six entries on the bestselling new comics list in France, including Cedric – also published in English by Cinebook – and The Bluecoats. Also born in Belgium, Lambilpublished his first comic, Sandy, in 1959. He has drawn 60 volumes of The Bluecoats since taking over from Salvérius, the series' original illustrator, who died in 1972.