Sam Caldwell has illustrated Santa vs the Naughty-Listers, written by Catherine Emmett and published by OUP Children’s (1 October 2026). A 32-page Christmas picture book, it follows three mischievous brothers who are convinced they are on Santa’s naughty list and hatch a plan to trap him and keep all the presents for themselves. Perfectly timed for the festive season and a brilliant showcase for Sam’s playful, character-driven illustration style.