A graphic novel is a type of comic book usually with a long and complex storyline similar to those of novels. The term also encompasses comic short story anthologies, and in some cases bound collections of previously published comic book series.

Graphic novels are often published in a better format than the comic magazines, using the same materials and methods as printed books, and are generally sold in bookstores and specialty comic book shops rather than at newsstands.

ON THE ROAD TO PERDITION

Road to Perdition is a series of fictional works written by Max Allan Collins.
The comi book of the original series, with art by Richard Piers Rayner, was published by DC Comics' imprint, Paradox Press.
It was adapted into the 2002 film of the same name, starring Tom Hanks and Daniel Craig, for which Collins also wrote the novelization.

On the Road to Perdition
This three-part miniseries of graphic novels was written after the original story, but deals with events within the same timeframe. All three parts were published as individual installments, but have also been reprinted as a single combined volume.

http://en.wikipedia.org/wiki/Road_to_Perdition_%28comics%29