 'Thimble Monkey Superstar', published by Cardiff's Firefly Press , was the eighth of Jon's books to be illustrated by Martin Chatterton.Jon is particularly noted for original and anarchic humour, typified by "Stinky Finger's House of Fun" and the subsequent "House of Fun" series illustrated by David Roberts.However, he has also written radical young adult fiction, such as anti-privatisation thriller "The Last Free Cat".