by Nickelodeon ; illustrator by Art Mawhinney. cover illustrated by Art Mawhinney by Melissa Langonegro; illustrated by Art Mawhinney by Steve Howson ; illustrated by Kate Daubney. by Enid Blyton ; illustrated by Maureen Bradley. by Enid blyton ; illustrated by Maureen Bradley. illustrated by Art Mawhinney. illustrated by Art Mawhinney [illustrated by Art Mawhinney]. illustrations by Art Mawhinney.