 Campbell has evolved his art style, using colour, collage and photo-shop to create art which "The Guardian" describe as having " a surreal, scruffy elegance".A collection of the "Dapper John" stories originally created in the late 1970s, along with an original cover, a new interview and other features, was published as an iPad app in December 2011 by digital publisher Panel Nine.In 2012 Top Shelf released two collections of "Campbell's Bacchus" series.