Kibuishi's webcomic was nominated for an Eisner Award for Best Digital Comic, and the work was compiled into a print volume in 2010.
The pages of Kibuishi's webcomic make use of a large, square format, rather than using traditional comic book dimensions.
In July 2006, Kibuishi put the webcomic on hiatus again due to work on his graphic novel Amulet, among other projects, and it returned in September 2007.
In each self-contained story the boy Copper and his talking dog Fred journey through a detailed but economically drawn landscape - sometimes beautiful, sometimes bleak, sometimes surreal.
Fred usually has some concise and forcefully expressive comment to make on their circumstances, while Copper is generally more cheerfully optimistic.
The first volume of Kibuishi's comic anthology Flight (2004) contains two short Copper stories: the 18-page "Maiden Voyage", and the 4-page "Picnic".