The book was illustrated in my more painterly, sketchy style - which was quite a change for me, but I really enjoyed getting my fingers covered in inks and wearing down my pencils!
...and their downs!
I've obviously been raking around Google and although there isn't a picture, it is available for pre-order through Foyles;
http://www.foyles.co.uk
I think this may be the cover... but watch this space! Exciting times!