art directors

I was having trouble finding art directors for book covers as not all of them have websites, but I found this site which has book covers with illustrators and designers with it which is a good starting point
http://abcoverd.co.uk/

Art Directors:

Suzanne Dean - art director penguin
http://suzannedean.co.uk/

Jo Walker - art director harper collins
http://www.jowalker.com/

David Mann - art director bloomsbury
http://www.davidmanndesign.co.uk/

Rachel Vale - art director pan macmillan 
https://twitter.com/abitnice?lang=en-gb

Maria Cruz Lord - art director macmillan 
http://mariacruzlord.com/

Helen Crawford White - illustrator/art director/designer studiohelen 
http://studiohelen.co.uk/

David Pearson - art director/designer pushkin press
http://typeasimage.com/

Sinem Erkas - illustrator/designer/art director/freelance 
http://www.sinemerkas.com/

Patrick Carpenter - art director quercus

Ben Norland - art director walker books

Rob Biddulph - art director/illustrator observer magazine
rob.biddulph@observer.co.uk