From book jackets to picture books, Mark has illustrated more than 100 books with publishers such as Macmillan, Bloomsbury, Oxford University Press, Scholastic, Egmont, Hodder & Stoughton and Little Tiger Press..

'Monsters. An owner's guide' won the Stockport book prize in 2011 and long listed for The Greenaway Medal. 'Robot Dog' written and illustrated by Mark won the Stockport Prize in 2006.

'Get in Gear' was runner-up in the Avensis Prize in 2003.